diff --git a/contrib/lib/src/databases.rs b/contrib/lib/src/databases.rs
index 935421a6..33e3560d 100644
--- a/contrib/lib/src/databases.rs
+++ b/contrib/lib/src/databases.rs
@@ -50,7 +50,7 @@
 //! In your application's source code, one-time:
 //!
 //! ```rust
-//! #![feature(proc_macro_hygiene, async_await)]
+//! #![feature(proc_macro_hygiene)]
 //!
 //! #[macro_use] extern crate rocket;
 //! #[macro_use] extern crate rocket_contrib;
@@ -73,7 +73,7 @@
 //! Whenever a connection to the database is needed:
 //!
 //! ```rust
-//! # #![feature(proc_macro_hygiene, async_await)]
+//! # #![feature(proc_macro_hygiene)]
 //! #
 //! # #[macro_use] extern crate rocket;
 //! # #[macro_use] extern crate rocket_contrib;
@@ -289,7 +289,7 @@
 //! connection to a given database:
 //!
 //! ```rust
-//! # #![feature(proc_macro_hygiene, async_await)]
+//! # #![feature(proc_macro_hygiene)]
 //! #
 //! # #[macro_use] extern crate rocket;
 //! # #[macro_use] extern crate rocket_contrib;
@@ -311,7 +311,7 @@
 //! connection type:
 //!
 //! ```rust
-//! # #![feature(proc_macro_hygiene, async_await)]
+//! # #![feature(proc_macro_hygiene)]
 //! #
 //! # #[macro_use] extern crate rocket;
 //! # #[macro_use] extern crate rocket_contrib;
diff --git a/contrib/lib/src/json.rs b/contrib/lib/src/json.rs
index b7b291e2..1ca40c92 100644
--- a/contrib/lib/src/json.rs
+++ b/contrib/lib/src/json.rs
@@ -44,7 +44,7 @@ pub use serde_json::{json_internal, json_internal_vec};
 /// or from [`serde`]. The data is parsed from the HTTP request body.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # extern crate rocket_contrib;
 /// # type User = usize;
@@ -68,7 +68,7 @@ pub use serde_json::{json_internal, json_internal_vec};
 /// set to `application/json` automatically.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # extern crate rocket_contrib;
 /// # type User = usize;
@@ -219,7 +219,7 @@ impl<T> DerefMut for Json<T> {
 /// fashion during request handling. This looks something like:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # #[macro_use] extern crate rocket_contrib;
 /// use rocket_contrib::json::JsonValue;
@@ -314,7 +314,7 @@ impl<'r> Responder<'r> for JsonValue {
 /// value created with this macro can be returned from a handler as follows:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # #[macro_use] extern crate rocket_contrib;
 /// use rocket_contrib::json::JsonValue;
diff --git a/contrib/lib/src/lib.rs b/contrib/lib/src/lib.rs
index a60e3bfe..dba2846d 100644
--- a/contrib/lib/src/lib.rs
+++ b/contrib/lib/src/lib.rs
@@ -1,4 +1,3 @@
-#![feature(async_await)]
 #![doc(html_root_url = "https://api.rocket.rs/v0.5")]
 #![doc(html_favicon_url = "https://rocket.rs/images/favicon.ico")]
 #![doc(html_logo_url = "https://rocket.rs/images/logo-boxed.png")]
diff --git a/contrib/lib/src/msgpack.rs b/contrib/lib/src/msgpack.rs
index 7a87f6f4..d8a02639 100644
--- a/contrib/lib/src/msgpack.rs
+++ b/contrib/lib/src/msgpack.rs
@@ -42,7 +42,7 @@ pub use rmp_serde::decode::Error;
 /// request body.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # extern crate rocket_contrib;
 /// # type User = usize;
@@ -66,7 +66,7 @@ pub use rmp_serde::decode::Error;
 /// response is set to `application/msgpack` automatically.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # extern crate rocket_contrib;
 /// # type User = usize;
diff --git a/contrib/lib/src/templates/metadata.rs b/contrib/lib/src/templates/metadata.rs
index 4503fa3e..b60bb673 100644
--- a/contrib/lib/src/templates/metadata.rs
+++ b/contrib/lib/src/templates/metadata.rs
@@ -12,7 +12,7 @@ use crate::templates::ContextManager;
 /// used as a request guard in any request handler.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # #[macro_use] extern crate rocket_contrib;
 /// use rocket_contrib::templates::{Template, Metadata};
@@ -46,7 +46,7 @@ impl Metadata<'_> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(proc_macro_hygiene, async_await)]
+    /// # #![feature(proc_macro_hygiene)]
     /// # #[macro_use] extern crate rocket;
     /// # extern crate rocket_contrib;
     /// #
@@ -67,7 +67,7 @@ impl Metadata<'_> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(proc_macro_hygiene, async_await)]
+    /// # #![feature(proc_macro_hygiene)]
     /// # #[macro_use] extern crate rocket;
     /// # extern crate rocket_contrib;
     /// #
diff --git a/contrib/lib/src/templates/mod.rs b/contrib/lib/src/templates/mod.rs
index ef18f1e1..1876c98e 100644
--- a/contrib/lib/src/templates/mod.rs
+++ b/contrib/lib/src/templates/mod.rs
@@ -37,7 +37,7 @@
 //!      of the template file minus the last two extensions, from a handler.
 //!
 //!      ```rust
-//!      # #![feature(proc_macro_hygiene, async_await)]
+//!      # #![feature(proc_macro_hygiene)]
 //!      # #[macro_use] extern crate rocket;
 //!      # #[macro_use] extern crate rocket_contrib;
 //!      # fn context() {  }
@@ -180,7 +180,7 @@ const DEFAULT_TEMPLATE_DIR: &str = "templates";
 /// returned from a request handler directly:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # #[macro_use] extern crate rocket_contrib;
 /// # fn context() {  }
diff --git a/contrib/lib/src/uuid.rs b/contrib/lib/src/uuid.rs
index 8904c991..d415cc66 100644
--- a/contrib/lib/src/uuid.rs
+++ b/contrib/lib/src/uuid.rs
@@ -42,7 +42,7 @@ type ParseError = <self::uuid_crate::Uuid as FromStr>::Err;
 /// You can use the `Uuid` type directly as a target of a dynamic parameter:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # #[macro_use] extern crate rocket_contrib;
 /// use rocket_contrib::uuid::Uuid;
@@ -56,7 +56,7 @@ type ParseError = <self::uuid_crate::Uuid as FromStr>::Err;
 /// You can also use the `Uuid` as a form value, including in query strings:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # #[macro_use] extern crate rocket_contrib;
 /// use rocket_contrib::uuid::Uuid;
diff --git a/contrib/lib/tests/compress_responder.rs b/contrib/lib/tests/compress_responder.rs
index fdef99c0..2d317ddf 100644
--- a/contrib/lib/tests/compress_responder.rs
+++ b/contrib/lib/tests/compress_responder.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use]
 #[cfg(all(feature = "brotli_compression", feature = "gzip_compression"))]
diff --git a/contrib/lib/tests/compression_fairing.rs b/contrib/lib/tests/compression_fairing.rs
index 491957a9..fa09188d 100644
--- a/contrib/lib/tests/compression_fairing.rs
+++ b/contrib/lib/tests/compression_fairing.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use]
 #[cfg(all(feature = "brotli_compression", feature = "gzip_compression"))]
diff --git a/contrib/lib/tests/helmet.rs b/contrib/lib/tests/helmet.rs
index 2b0f053e..7ece1df7 100644
--- a/contrib/lib/tests/helmet.rs
+++ b/contrib/lib/tests/helmet.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use]
 #[cfg(feature = "helmet")]
diff --git a/contrib/lib/tests/static_files.rs b/contrib/lib/tests/static_files.rs
index 1986c9c2..c9302987 100644
--- a/contrib/lib/tests/static_files.rs
+++ b/contrib/lib/tests/static_files.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[cfg(feature = "serve")]
 mod static_tests {
diff --git a/contrib/lib/tests/templates.rs b/contrib/lib/tests/templates.rs
index 371adfd5..25c62f90 100644
--- a/contrib/lib/tests/templates.rs
+++ b/contrib/lib/tests/templates.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[cfg(feature = "templates")]
 #[macro_use] extern crate rocket;
diff --git a/core/codegen/src/lib.rs b/core/codegen/src/lib.rs
index 199292f0..693f0225 100644
--- a/core/codegen/src/lib.rs
+++ b/core/codegen/src/lib.rs
@@ -1,5 +1,4 @@
 #![feature(proc_macro_diagnostic, proc_macro_span)]
-#![feature(async_await)]
 #![recursion_limit="128"]
 
 #![doc(html_root_url = "https://api.rocket.rs/v0.5")]
@@ -30,7 +29,7 @@
 //! crate root:
 //!
 //! ```rust
-//! #![feature(proc_macro_hygiene, async_await)]
+//! #![feature(proc_macro_hygiene)]
 //!
 //! #[macro_use] extern crate rocket;
 //! # #[get("/")] fn hello() { }
@@ -40,7 +39,7 @@
 //! Or, alternatively, selectively import from the top-level scope:
 //!
 //! ```rust
-//! #![feature(proc_macro_hygiene, async_await)]
+//! #![feature(proc_macro_hygiene)]
 //! # extern crate rocket;
 //!
 //! use rocket::{get, routes};
@@ -147,7 +146,7 @@ macro_rules! route_attribute {
         /// functions:
         ///
         /// ```rust
-        /// # #![feature(proc_macro_hygiene, async_await)]
+        /// # #![feature(proc_macro_hygiene)]
         /// # #[macro_use] extern crate rocket;
         /// #
         /// #[get("/")]
@@ -170,7 +169,7 @@ macro_rules! route_attribute {
         /// specified:
         ///
         /// ```rust
-        /// # #![feature(proc_macro_hygiene, async_await)]
+        /// # #![feature(proc_macro_hygiene)]
         /// # #[macro_use] extern crate rocket;
         /// #
         /// #[route(GET, path = "/")]
@@ -231,7 +230,7 @@ macro_rules! route_attribute {
         /// the arguments `foo`, `baz`, `msg`, `rest`, and `form`:
         ///
         /// ```rust
-        /// # #![feature(proc_macro_hygiene, async_await)]
+        /// # #![feature(proc_macro_hygiene)]
         /// # #[macro_use] extern crate rocket;
         /// # use rocket::request::Form;
         /// # use std::path::PathBuf;
@@ -343,7 +342,7 @@ route_attribute!(options => Method::Options);
 /// This attribute can only be applied to free functions:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// use rocket::Request;
@@ -755,7 +754,7 @@ pub fn derive_uri_display_path(input: TokenStream) -> TokenStream {
 /// corresponding [`Route`] structures. For example, given the following routes:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// #[get("/")]
@@ -770,7 +769,7 @@ pub fn derive_uri_display_path(input: TokenStream) -> TokenStream {
 /// The `routes!` macro can be used as:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// # use rocket::http::Method;
@@ -814,7 +813,7 @@ pub fn routes(input: TokenStream) -> TokenStream {
 /// catchers:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// #[catch(404)]
@@ -829,7 +828,7 @@ pub fn routes(input: TokenStream) -> TokenStream {
 /// The `catchers!` macro can be used as:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// # #[catch(404)] fn not_found() { /* .. */ }
@@ -871,7 +870,7 @@ pub fn catchers(input: TokenStream) -> TokenStream {
 /// For example, for the following route:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// #[get("/person/<name>?<age>")]
@@ -885,7 +884,7 @@ pub fn catchers(input: TokenStream) -> TokenStream {
 /// A URI can be created as follows:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// # #[get("/person/<name>?<age>")]
diff --git a/core/codegen/tests/expansion.rs b/core/codegen/tests/expansion.rs
index d5d4f00e..aaaf2fcd 100644
--- a/core/codegen/tests/expansion.rs
+++ b/core/codegen/tests/expansion.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/responder.rs b/core/codegen/tests/responder.rs
index 9608faf0..0df09bc6 100644
--- a/core/codegen/tests/responder.rs
+++ b/core/codegen/tests/responder.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 use rocket::local::Client;
 use rocket::response::Responder;
diff --git a/core/codegen/tests/route-data.rs b/core/codegen/tests/route-data.rs
index 8a9cbc6f..e15f4bb5 100644
--- a/core/codegen/tests/route-data.rs
+++ b/core/codegen/tests/route-data.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/route-format.rs b/core/codegen/tests/route-format.rs
index d29e77cb..32bb935c 100644
--- a/core/codegen/tests/route-format.rs
+++ b/core/codegen/tests/route-format.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/route-ranking.rs b/core/codegen/tests/route-ranking.rs
index 5fcc364b..a85ee24c 100644
--- a/core/codegen/tests/route-ranking.rs
+++ b/core/codegen/tests/route-ranking.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/route.rs b/core/codegen/tests/route.rs
index 8afcea85..bdc92e25 100644
--- a/core/codegen/tests/route.rs
+++ b/core/codegen/tests/route.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 // Rocket sometimes generates mangled identifiers that activate the
 // non_snake_case lint. We deny the lint in this test to ensure that
diff --git a/core/codegen/tests/typed-uris.rs b/core/codegen/tests/typed-uris.rs
index 47d313bc..7f366e7e 100644
--- a/core/codegen/tests/typed-uris.rs
+++ b/core/codegen/tests/typed-uris.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 #![allow(dead_code, unused_variables)]
 
 #[macro_use] extern crate rocket;
diff --git a/core/codegen/tests/ui-fail/catchers.rs b/core/codegen/tests/ui-fail/catchers.rs
index 0168f3cd..627bf0c2 100644
--- a/core/codegen/tests/ui-fail/catchers.rs
+++ b/core/codegen/tests/ui-fail/catchers.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/ui-fail/route-attribute-general-syntax.rs b/core/codegen/tests/ui-fail/route-attribute-general-syntax.rs
index 6f3dfda1..8457f96b 100644
--- a/core/codegen/tests/ui-fail/route-attribute-general-syntax.rs
+++ b/core/codegen/tests/ui-fail/route-attribute-general-syntax.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/ui-fail/route-path-bad-syntax.rs b/core/codegen/tests/ui-fail/route-path-bad-syntax.rs
index 1f79e386..ab6a8a4a 100644
--- a/core/codegen/tests/ui-fail/route-path-bad-syntax.rs
+++ b/core/codegen/tests/ui-fail/route-path-bad-syntax.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/ui-fail/route-type-errors.rs b/core/codegen/tests/ui-fail/route-type-errors.rs
index 6cedb32f..f97645ae 100644
--- a/core/codegen/tests/ui-fail/route-type-errors.rs
+++ b/core/codegen/tests/ui-fail/route-type-errors.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/ui-fail/route-warnings.rs b/core/codegen/tests/ui-fail/route-warnings.rs
index 57e3c93d..9111a216 100644
--- a/core/codegen/tests/ui-fail/route-warnings.rs
+++ b/core/codegen/tests/ui-fail/route-warnings.rs
@@ -1,6 +1,6 @@
 // must-compile-successfully
 
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/ui-fail/routes.rs b/core/codegen/tests/ui-fail/routes.rs
index 75952d25..954293a5 100644
--- a/core/codegen/tests/ui-fail/routes.rs
+++ b/core/codegen/tests/ui-fail/routes.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/ui-fail/typed-uri-bad-type.rs b/core/codegen/tests/ui-fail/typed-uri-bad-type.rs
index caf45f7f..da02a35b 100644
--- a/core/codegen/tests/ui-fail/typed-uri-bad-type.rs
+++ b/core/codegen/tests/ui-fail/typed-uri-bad-type.rs
@@ -2,7 +2,7 @@
 // normalize-stderr-test: "and \d+ others" -> "and $$N others"
 // normalize-stderr-test: "::: (.*)/core/http" -> "::: $$ROCKET/core/http"
 
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/ui-fail/typed-uris-bad-params.rs b/core/codegen/tests/ui-fail/typed-uris-bad-params.rs
index 2bde677c..2baf5be9 100644
--- a/core/codegen/tests/ui-fail/typed-uris-bad-params.rs
+++ b/core/codegen/tests/ui-fail/typed-uris-bad-params.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/ui-fail/typed-uris-invalid-syntax.rs b/core/codegen/tests/ui-fail/typed-uris-invalid-syntax.rs
index 34c71811..0c22cc17 100644
--- a/core/codegen/tests/ui-fail/typed-uris-invalid-syntax.rs
+++ b/core/codegen/tests/ui-fail/typed-uris-invalid-syntax.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/codegen/tests/uri_display.rs b/core/codegen/tests/uri_display.rs
index bcd112d4..b51d716a 100644
--- a/core/codegen/tests/uri_display.rs
+++ b/core/codegen/tests/uri_display.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/http/src/cookies.rs b/core/http/src/cookies.rs
index 902b858c..73eb65a1 100644
--- a/core/http/src/cookies.rs
+++ b/core/http/src/cookies.rs
@@ -54,7 +54,7 @@ mod key {
 /// a handler to retrieve the value of a "message" cookie.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// use rocket::http::Cookies;
 ///
@@ -74,7 +74,7 @@ mod key {
 /// [private cookie]: Cookies::add_private()
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// use rocket::http::Status;
diff --git a/core/http/src/lib.rs b/core/http/src/lib.rs
index 37f5d7e6..c27ed519 100644
--- a/core/http/src/lib.rs
+++ b/core/http/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 #![recursion_limit="512"]
 
 #![warn(rust_2018_idioms)]
diff --git a/core/http/src/uri/from_uri_param.rs b/core/http/src/uri/from_uri_param.rs
index a46356cc..6ad63bc6 100644
--- a/core/http/src/uri/from_uri_param.rs
+++ b/core/http/src/uri/from_uri_param.rs
@@ -155,7 +155,7 @@ use crate::uri::{self, UriPart, UriDisplay};
 /// With these implementations, the following typechecks:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # use std::fmt;
 /// use rocket::http::RawStr;
diff --git a/core/http/src/uri/uri_display.rs b/core/http/src/uri/uri_display.rs
index 165b712a..d75c8dfc 100644
--- a/core/http/src/uri/uri_display.rs
+++ b/core/http/src/uri/uri_display.rs
@@ -61,7 +61,7 @@ use crate::uri::{Uri, UriPart, Path, Query, Formatter};
 /// the following route:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #[get("/item/<id>?<track>")]
 /// fn get_item(id: i32, track: Option<String>) { /* .. */ }
@@ -70,7 +70,7 @@ use crate::uri::{Uri, UriPart, Path, Query, Formatter};
 /// A URI for this route can be generated as follows:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # type T = ();
 /// # #[get("/item/<id>?<track>")]
@@ -236,7 +236,7 @@ use crate::uri::{Uri, UriPart, Path, Query, Formatter};
 /// `UriDisplay` implementation is required.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// use rocket::http::RawStr;
 /// use rocket::request::FromParam;
@@ -434,7 +434,7 @@ impl<T: UriDisplay<Query>, E> UriDisplay<Query> for Result<T, E> {
 /// trait for the corresponding `UriPart`.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #[get("/item/<id>?<track>")]
 /// fn get_item(id: i32, track: Option<u8>) { /* .. */ }
diff --git a/core/lib/build.rs b/core/lib/build.rs
index b6ca3322..e03676c2 100644
--- a/core/lib/build.rs
+++ b/core/lib/build.rs
@@ -3,8 +3,8 @@
 use yansi::{Paint, Color::{Red, Yellow, Blue}};
 
 // Specifies the minimum nightly version needed to compile Rocket.
-const MIN_DATE: &'static str = "2019-07-03";
-const MIN_VERSION: &'static str = "1.37.0-nightly";
+const MIN_DATE: &'static str = "2019-08-20";
+const MIN_VERSION: &'static str = "1.39.0-nightly";
 
 macro_rules! err {
     ($version:expr, $date:expr, $msg:expr) => (
diff --git a/core/lib/src/catcher.rs b/core/lib/src/catcher.rs
index 4b78edf5..43a01bea 100644
--- a/core/lib/src/catcher.rs
+++ b/core/lib/src/catcher.rs
@@ -36,7 +36,7 @@ use yansi::Color::*;
 /// declared using the `catch` decorator, as follows:
 ///
 /// ```rust
-/// #![feature(proc_macro_hygiene, async_await)]
+/// #![feature(proc_macro_hygiene)]
 ///
 /// #[macro_use] extern crate rocket;
 ///
diff --git a/core/lib/src/data/data.rs b/core/lib/src/data/data.rs
index 8a42b6a3..8fd5f6cc 100644
--- a/core/lib/src/data/data.rs
+++ b/core/lib/src/data/data.rs
@@ -22,7 +22,7 @@ const PEEK_BYTES: usize = 512;
 /// specifying the `data = "<var>"` route parameter as follows:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # type DataGuard = rocket::data::Data;
 /// #[post("/submit", data = "<var>")]
@@ -133,7 +133,6 @@ impl Data {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use std::io;
     /// use futures::io::AllowStdIo;
     /// use rocket::Data;
@@ -161,7 +160,6 @@ impl Data {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use std::io;
     /// use rocket::Data;
     ///
diff --git a/core/lib/src/data/from_data.rs b/core/lib/src/data/from_data.rs
index 0435586a..90d76c5b 100644
--- a/core/lib/src/data/from_data.rs
+++ b/core/lib/src/data/from_data.rs
@@ -142,7 +142,7 @@ pub type FromDataFuture<'a, T, E> = Pin<Box<dyn Future<Output = Outcome<T, E>> +
 /// if the guard returns successfully.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # type DataGuard = rocket::data::Data;
 /// #[post("/submit", data = "<var>")]
@@ -188,7 +188,7 @@ pub type FromDataFuture<'a, T, E> = Pin<Box<dyn Future<Output = Outcome<T, E>> +
 /// `String` (an `&str`).
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # #[derive(Debug)]
 /// # struct Name<'a> { first: &'a str, last: &'a str, }
@@ -443,7 +443,7 @@ impl<'a> FromData<'a> for Data {
 /// that you can retrieve it directly from a client's request body:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # type Person = rocket::data::Data;
 /// #[post("/person", data = "<person>")]
@@ -455,7 +455,7 @@ impl<'a> FromData<'a> for Data {
 /// A `FromDataSimple` implementation allowing this looks like:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// # #[derive(Debug)]
diff --git a/core/lib/src/fairing/ad_hoc.rs b/core/lib/src/fairing/ad_hoc.rs
index a2b9f1e2..eb4596d4 100644
--- a/core/lib/src/fairing/ad_hoc.rs
+++ b/core/lib/src/fairing/ad_hoc.rs
@@ -117,7 +117,6 @@ impl AdHoc {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use rocket::fairing::AdHoc;
     ///
     /// // The no-op response fairing.
diff --git a/core/lib/src/fairing/mod.rs b/core/lib/src/fairing/mod.rs
index dbde25e5..717db7d7 100644
--- a/core/lib/src/fairing/mod.rs
+++ b/core/lib/src/fairing/mod.rs
@@ -20,7 +20,6 @@
 //! write:
 //!
 //! ```rust
-//! # #![feature(async_await)]
 //! # use rocket::fairing::AdHoc;
 //! # let req_fairing = AdHoc::on_request("Request", |_, _| ());
 //! # let res_fairing = AdHoc::on_response("Response", |_, _| Box::pin(async move {}));
@@ -207,7 +206,6 @@ pub use self::info_kind::{Info, Kind};
 /// path.
 ///
 /// ```rust
-/// # #![feature(async_await)]
 /// use std::future::Future;
 /// use std::io::Cursor;
 /// use std::pin::Pin;
@@ -271,7 +269,6 @@ pub use self::info_kind::{Info, Kind};
 /// request guard.
 ///
 /// ```rust
-/// # #![feature(async_await)]
 /// # use std::future::Future;
 /// # use std::pin::Pin;
 /// # use std::time::{Duration, SystemTime};
diff --git a/core/lib/src/handler.rs b/core/lib/src/handler.rs
index 08bdee31..5d7df23e 100644
--- a/core/lib/src/handler.rs
+++ b/core/lib/src/handler.rs
@@ -42,7 +42,6 @@ pub type HandlerFuture<'r> = std::pin::Pin<Box<dyn Future<Output = Outcome<'r>>
 /// Such a handler might be written and used as follows:
 ///
 /// ```rust
-/// # #![feature(async_await)]
 /// # #[derive(Copy, Clone)] enum Kind { Simple, Intermediate, Complex, }
 /// use rocket::{Request, Data, Route, http::Method};
 /// use rocket::handler::{self, Handler, Outcome, HandlerFuture};
@@ -92,7 +91,7 @@ pub type HandlerFuture<'r> = std::pin::Pin<Box<dyn Future<Output = Outcome<'r>>
 /// managed state and a static route, as follows:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// # #[derive(Copy, Clone)]
@@ -199,7 +198,6 @@ impl<'r> Outcome<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use rocket::{Request, Data};
     /// use rocket::handler::{Outcome, HandlerFuture};
     ///
@@ -255,7 +253,6 @@ impl<'r> Outcome<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use rocket::{Request, Data};
     /// use rocket::handler::{Outcome, HandlerFuture};
     ///
@@ -284,7 +281,6 @@ impl<'r> Outcome<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use rocket::{Request, Data};
     /// use rocket::handler::{Outcome, HandlerFuture};
     /// use rocket::http::Status;
@@ -309,7 +305,6 @@ impl<'r> Outcome<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use rocket::{Request, Data};
     /// use rocket::handler::{Outcome, HandlerFuture};
     ///
diff --git a/core/lib/src/lib.rs b/core/lib/src/lib.rs
index 4d665aa0..7414095c 100644
--- a/core/lib/src/lib.rs
+++ b/core/lib/src/lib.rs
@@ -1,5 +1,4 @@
 #![feature(proc_macro_hygiene)]
-#![feature(async_await)]
 
 #![recursion_limit="256"]
 
@@ -48,7 +47,7 @@
 //! Then, add the following to the top of your `main.rs` file:
 //!
 //! ```rust
-//! #![feature(proc_macro_hygiene, async_await)]
+//! #![feature(proc_macro_hygiene)]
 //!
 //! #[macro_use] extern crate rocket;
 //! # #[get("/")] fn hello() { }
@@ -59,7 +58,7 @@
 //! write Rocket applications. Here's a simple example to get you started:
 //!
 //! ```rust
-//! #![feature(proc_macro_hygiene, async_await)]
+//! #![feature(proc_macro_hygiene)]
 //!
 //! #[macro_use] extern crate rocket;
 //!
diff --git a/core/lib/src/local/mod.rs b/core/lib/src/local/mod.rs
index de6938cf..676f8680 100644
--- a/core/lib/src/local/mod.rs
+++ b/core/lib/src/local/mod.rs
@@ -67,7 +67,7 @@
 //! consider the following complete "Hello, world!" application, with testing.
 //!
 //! ```rust
-//! #![feature(proc_macro_hygiene, async_await)]
+//! #![feature(proc_macro_hygiene)]
 //!
 //! #[macro_use] extern crate rocket;
 //!
diff --git a/core/lib/src/request/form/error.rs b/core/lib/src/request/form/error.rs
index fdd1b3fc..086be805 100644
--- a/core/lib/src/request/form/error.rs
+++ b/core/lib/src/request/form/error.rs
@@ -50,7 +50,7 @@ pub enum FormDataError<'f, E> {
 /// # Example
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// use rocket::request::{Form, FormError, FormDataError};
 ///
diff --git a/core/lib/src/request/form/form.rs b/core/lib/src/request/form/form.rs
index 25ca26c1..7f488d09 100644
--- a/core/lib/src/request/form/form.rs
+++ b/core/lib/src/request/form/form.rs
@@ -33,7 +33,7 @@ use crate::ext::AsyncReadExt as _;
 /// implements the `FromForm` trait:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// use rocket::request::Form;
 /// use rocket::http::RawStr;
@@ -69,7 +69,7 @@ use crate::ext::AsyncReadExt as _;
 /// A handler that handles a form of this type can similarly by written:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #![allow(deprecated, unused_attributes)]
 /// # #[macro_use] extern crate rocket;
 /// # use rocket::request::Form;
@@ -122,7 +122,7 @@ impl<T> Form<T> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(proc_macro_hygiene, async_await)]
+    /// # #![feature(proc_macro_hygiene)]
     /// # #[macro_use] extern crate rocket;
     /// use rocket::request::Form;
     ///
diff --git a/core/lib/src/request/form/from_form.rs b/core/lib/src/request/form/from_form.rs
index 406f7d46..08c55985 100644
--- a/core/lib/src/request/form/from_form.rs
+++ b/core/lib/src/request/form/from_form.rs
@@ -13,7 +13,7 @@ use crate::request::FormItems;
 /// validation.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #![allow(deprecated, dead_code, unused_attributes)]
 /// # #[macro_use] extern crate rocket;
 /// #[derive(FromForm)]
@@ -30,7 +30,7 @@ use crate::request::FormItems;
 /// data via the `data` parameter and `Form` type.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #![allow(deprecated, dead_code, unused_attributes)]
 /// # #[macro_use] extern crate rocket;
 /// # use rocket::request::Form;
diff --git a/core/lib/src/request/form/from_form_value.rs b/core/lib/src/request/form/from_form_value.rs
index 2e083d9b..477639d2 100644
--- a/core/lib/src/request/form/from_form_value.rs
+++ b/core/lib/src/request/form/from_form_value.rs
@@ -43,7 +43,7 @@ use crate::http::RawStr;
 /// according to its target type:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # type Size = String;
 /// #[get("/item?<id>&<size>")]
diff --git a/core/lib/src/request/form/lenient.rs b/core/lib/src/request/form/lenient.rs
index a70dcce2..d25b3f1c 100644
--- a/core/lib/src/request/form/lenient.rs
+++ b/core/lib/src/request/form/lenient.rs
@@ -31,7 +31,7 @@ use crate::http::uri::{Query, FromUriParam};
 /// handler:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// use rocket::request::LenientForm;
 ///
@@ -67,7 +67,7 @@ impl<T> LenientForm<T> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(proc_macro_hygiene, async_await)]
+    /// # #![feature(proc_macro_hygiene)]
     /// # #[macro_use] extern crate rocket;
     /// use rocket::request::LenientForm;
     ///
diff --git a/core/lib/src/request/from_request.rs b/core/lib/src/request/from_request.rs
index cd66d825..8f603487 100644
--- a/core/lib/src/request/from_request.rs
+++ b/core/lib/src/request/from_request.rs
@@ -55,7 +55,7 @@ impl<S, E> IntoOutcome<S, (Status, E), ()> for Result<S, E> {
 /// guard.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # use rocket::http::Method;
 /// # type A = Method; type B = Method; type C = Method; type T = ();
@@ -165,7 +165,7 @@ impl<S, E> IntoOutcome<S, (Status, E), ()> for Result<S, E> {
 /// `sensitive` handler.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// use rocket::Outcome;
@@ -220,7 +220,7 @@ impl<S, E> IntoOutcome<S, (Status, E), ()> for Result<S, E> {
 /// routes (`admin_dashboard` and `user_dashboard`):
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # #[cfg(feature = "private-cookies")] mod inner {
 /// # use rocket::outcome::{IntoOutcome, Outcome};
@@ -283,7 +283,7 @@ impl<S, E> IntoOutcome<S, (Status, E), ()> for Result<S, E> {
 /// used, as illustrated below:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # #[cfg(feature = "private-cookies")] mod inner {
 /// # use rocket::outcome::{IntoOutcome, Outcome};
diff --git a/core/lib/src/request/param.rs b/core/lib/src/request/param.rs
index 68baf0c3..a1d3eaa6 100644
--- a/core/lib/src/request/param.rs
+++ b/core/lib/src/request/param.rs
@@ -19,7 +19,7 @@ use crate::http::{RawStr, uri::{Segments, SegmentError}};
 /// handler for the dynamic `"/<id>"` path:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #[get("/<id>")]
 /// fn hello(id: usize) -> String {
@@ -54,7 +54,7 @@ use crate::http::{RawStr, uri::{Segments, SegmentError}};
 /// parameter as follows:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # use rocket::http::RawStr;
 /// #[get("/<id>")]
@@ -172,7 +172,7 @@ use crate::http::{RawStr, uri::{Segments, SegmentError}};
 /// dynamic path segment:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # use rocket::request::FromParam;
 /// # use rocket::http::RawStr;
diff --git a/core/lib/src/request/query.rs b/core/lib/src/request/query.rs
index c6895ec6..90f06a96 100644
--- a/core/lib/src/request/query.rs
+++ b/core/lib/src/request/query.rs
@@ -8,7 +8,7 @@ use crate::request::{FormItems, FormItem, Form, LenientForm, FromForm};
 /// generation for every trailing query parameter, `<params..>` below:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// # use rocket::request::Form;
@@ -82,7 +82,7 @@ impl<'q> Iterator for Query<'q> {
 /// route:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// use rocket::request::Form;
 ///
diff --git a/core/lib/src/request/state.rs b/core/lib/src/request/state.rs
index f1caae0b..a2f84c05 100644
--- a/core/lib/src/request/state.rs
+++ b/core/lib/src/request/state.rs
@@ -22,7 +22,7 @@ use crate::http::Status;
 /// following example does just this:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// use rocket::State;
 ///
@@ -87,7 +87,7 @@ use crate::http::Status;
 /// [`State::from()`] static method:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// use rocket::State;
 ///
diff --git a/core/lib/src/response/flash.rs b/core/lib/src/response/flash.rs
index ea9bb196..4a0e2bdc 100644
--- a/core/lib/src/response/flash.rs
+++ b/core/lib/src/response/flash.rs
@@ -48,7 +48,7 @@ const FLASH_COOKIE_DELIM: char = ':';
 /// message on both the request and response sides.
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// use rocket::response::{Flash, Redirect};
 /// use rocket::request::FlashMessage;
diff --git a/core/lib/src/response/redirect.rs b/core/lib/src/response/redirect.rs
index e56dc4b1..a1d68be0 100644
--- a/core/lib/src/response/redirect.rs
+++ b/core/lib/src/response/redirect.rs
@@ -26,7 +26,7 @@ use crate::http::Status;
 /// a route, _always_ use [`uri!`] to construct a valid [`Origin`]:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// use rocket::response::Redirect;
 ///
diff --git a/core/lib/src/response/responder.rs b/core/lib/src/response/responder.rs
index 008a27d9..ea672099 100644
--- a/core/lib/src/response/responder.rs
+++ b/core/lib/src/response/responder.rs
@@ -14,7 +14,7 @@ use crate::request::Request;
 /// as illustrated below with `T`:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// # type T = ();
 /// #
@@ -155,7 +155,7 @@ use crate::request::Request;
 /// following `Responder` implementation accomplishes this:
 ///
 /// ```rust
-/// # #![feature(proc_macro_hygiene, async_await)]
+/// # #![feature(proc_macro_hygiene)]
 /// # #[macro_use] extern crate rocket;
 /// #
 /// # #[derive(Debug)]
diff --git a/core/lib/src/response/response.rs b/core/lib/src/response/response.rs
index ff8ab25f..0d726c6b 100644
--- a/core/lib/src/response/response.rs
+++ b/core/lib/src/response/response.rs
@@ -345,7 +345,6 @@ impl<'r> ResponseBuilder<'r> {
     /// # Example
     ///
     /// ```rust,ignore
-    /// # #![feature(async_await)]
     /// use rocket::Response;
     /// use futures::compat::{AsyncRead01CompatExt, Future01CompatExt};
     /// use tokio::fs::File;
@@ -373,7 +372,6 @@ impl<'r> ResponseBuilder<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use rocket::Response;
     /// use futures::compat::{AsyncRead01CompatExt, Future01CompatExt};
     /// use tokio::fs::File;
@@ -402,7 +400,6 @@ impl<'r> ResponseBuilder<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use rocket::Response;
     /// use futures::compat::{AsyncRead01CompatExt, Future01CompatExt};
     /// use tokio::fs::File;
@@ -896,7 +893,6 @@ impl<'r> Response<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use std::io::Cursor;
     /// use rocket::Response;
     ///
@@ -928,7 +924,6 @@ impl<'r> Response<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use std::io::Cursor;
     /// use rocket::Response;
     ///
@@ -959,7 +954,6 @@ impl<'r> Response<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use std::io::Cursor;
     /// use rocket::Response;
     ///
@@ -989,7 +983,6 @@ impl<'r> Response<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use std::io::Cursor;
     /// use rocket::Response;
     ///
@@ -1039,7 +1032,6 @@ impl<'r> Response<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use std::io::Cursor;
     /// use rocket::Response;
     ///
@@ -1068,7 +1060,6 @@ impl<'r> Response<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use std::io::repeat;
     /// use futures::io::AsyncReadExt;
     /// use rocket::Response;
@@ -1091,7 +1082,6 @@ impl<'r> Response<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use std::io::repeat;
     /// use futures::io::AsyncReadExt;
     /// use rocket::Response;
@@ -1116,7 +1106,6 @@ impl<'r> Response<'r> {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(async_await)]
     /// use std::io::Cursor;
     /// use rocket::response::{Response, Body};
     ///
diff --git a/core/lib/src/rocket.rs b/core/lib/src/rocket.rs
index 4a9b1938..62ef912b 100644
--- a/core/lib/src/rocket.rs
+++ b/core/lib/src/rocket.rs
@@ -497,7 +497,7 @@ impl Rocket {
     /// dispatched to the `hi` route.
     ///
     /// ```rust
-    /// # #![feature(proc_macro_hygiene, async_await)]
+    /// # #![feature(proc_macro_hygiene)]
     /// # #[macro_use] extern crate rocket;
     /// #
     /// #[get("/world")]
@@ -569,7 +569,7 @@ impl Rocket {
     /// # Examples
     ///
     /// ```rust
-    /// # #![feature(proc_macro_hygiene, async_await)]
+    /// # #![feature(proc_macro_hygiene)]
     /// # #[macro_use] extern crate rocket;
     /// use rocket::Request;
     ///
@@ -625,7 +625,7 @@ impl Rocket {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(proc_macro_hygiene, async_await)]
+    /// # #![feature(proc_macro_hygiene)]
     /// # #[macro_use] extern crate rocket;
     /// use rocket::State;
     ///
@@ -662,7 +662,7 @@ impl Rocket {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(proc_macro_hygiene, async_await)]
+    /// # #![feature(proc_macro_hygiene)]
     /// # #[macro_use] extern crate rocket;
     /// use rocket::Rocket;
     /// use rocket::fairing::AdHoc;
@@ -806,7 +806,7 @@ impl Rocket {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(proc_macro_hygiene, async_await)]
+    /// # #![feature(proc_macro_hygiene)]
     /// # #[macro_use] extern crate rocket;
     /// use rocket::Rocket;
     /// use rocket::fairing::AdHoc;
@@ -862,7 +862,7 @@ impl Rocket {
     /// # Example
     ///
     /// ```rust
-    /// # #![feature(proc_macro_hygiene, async_await)]
+    /// # #![feature(proc_macro_hygiene)]
     /// # #[macro_use] extern crate rocket;
     /// use rocket::Rocket;
     /// use rocket::fairing::AdHoc;
diff --git a/core/lib/tests/absolute-uris-okay-issue-443.rs b/core/lib/tests/absolute-uris-okay-issue-443.rs
index 7f57295e..758d1d72 100644
--- a/core/lib/tests/absolute-uris-okay-issue-443.rs
+++ b/core/lib/tests/absolute-uris-okay-issue-443.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/conditionally-set-server-header-996.rs b/core/lib/tests/conditionally-set-server-header-996.rs
index a6f8fac5..f20f18a1 100644
--- a/core/lib/tests/conditionally-set-server-header-996.rs
+++ b/core/lib/tests/conditionally-set-server-header-996.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/derive-reexports.rs b/core/lib/tests/derive-reexports.rs
index 18513acb..a19a7195 100644
--- a/core/lib/tests/derive-reexports.rs
+++ b/core/lib/tests/derive-reexports.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 use rocket;
 
diff --git a/core/lib/tests/fairing_before_head_strip-issue-546.rs b/core/lib/tests/fairing_before_head_strip-issue-546.rs
index cc1536b4..8f196bb2 100644
--- a/core/lib/tests/fairing_before_head_strip-issue-546.rs
+++ b/core/lib/tests/fairing_before_head_strip-issue-546.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/flash-lazy-removes-issue-466.rs b/core/lib/tests/flash-lazy-removes-issue-466.rs
index 9a3c73be..3cd3e2ee 100644
--- a/core/lib/tests/flash-lazy-removes-issue-466.rs
+++ b/core/lib/tests/flash-lazy-removes-issue-466.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/form_method-issue-45.rs b/core/lib/tests/form_method-issue-45.rs
index b65230e8..a1e67ee8 100644
--- a/core/lib/tests/form_method-issue-45.rs
+++ b/core/lib/tests/form_method-issue-45.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/form_value_decoding-issue-82.rs b/core/lib/tests/form_value_decoding-issue-82.rs
index b6fc477f..d4265583 100644
--- a/core/lib/tests/form_value_decoding-issue-82.rs
+++ b/core/lib/tests/form_value_decoding-issue-82.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/head_handling.rs b/core/lib/tests/head_handling.rs
index 3792890b..53c4045c 100644
--- a/core/lib/tests/head_handling.rs
+++ b/core/lib/tests/head_handling.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/limits.rs b/core/lib/tests/limits.rs
index 7f3dca65..01750db3 100644
--- a/core/lib/tests/limits.rs
+++ b/core/lib/tests/limits.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/local-request-content-type-issue-505.rs b/core/lib/tests/local-request-content-type-issue-505.rs
index 8d2f9344..8a661865 100644
--- a/core/lib/tests/local-request-content-type-issue-505.rs
+++ b/core/lib/tests/local-request-content-type-issue-505.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/local_request_private_cookie-issue-368.rs b/core/lib/tests/local_request_private_cookie-issue-368.rs
index 247ec6c2..3fb74c25 100644
--- a/core/lib/tests/local_request_private_cookie-issue-368.rs
+++ b/core/lib/tests/local_request_private_cookie-issue-368.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use]
 #[cfg(feature = "private-cookies")]
diff --git a/core/lib/tests/nested-fairing-attaches.rs b/core/lib/tests/nested-fairing-attaches.rs
index ba1554cd..f0f57a91 100644
--- a/core/lib/tests/nested-fairing-attaches.rs
+++ b/core/lib/tests/nested-fairing-attaches.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/precise-content-type-matching.rs b/core/lib/tests/precise-content-type-matching.rs
index f1c651dd..652554e6 100644
--- a/core/lib/tests/precise-content-type-matching.rs
+++ b/core/lib/tests/precise-content-type-matching.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/redirect_from_catcher-issue-113.rs b/core/lib/tests/redirect_from_catcher-issue-113.rs
index 15c46f27..f50f2ba3 100644
--- a/core/lib/tests/redirect_from_catcher-issue-113.rs
+++ b/core/lib/tests/redirect_from_catcher-issue-113.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/responder_lifetime-issue-345.rs b/core/lib/tests/responder_lifetime-issue-345.rs
index 8e5b3ed2..73dbc8d2 100644
--- a/core/lib/tests/responder_lifetime-issue-345.rs
+++ b/core/lib/tests/responder_lifetime-issue-345.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 #![allow(dead_code)] // This test is only here so that we can ensure it compiles.
 
 #[macro_use] extern crate rocket;
diff --git a/core/lib/tests/route_guard.rs b/core/lib/tests/route_guard.rs
index d914cc65..cdd8f9f6 100644
--- a/core/lib/tests/route_guard.rs
+++ b/core/lib/tests/route_guard.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/segments-issues-41-86.rs b/core/lib/tests/segments-issues-41-86.rs
index 0c32d3af..f002e7d9 100644
--- a/core/lib/tests/segments-issues-41-86.rs
+++ b/core/lib/tests/segments-issues-41-86.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/strict_and_lenient_forms.rs b/core/lib/tests/strict_and_lenient_forms.rs
index 6643b622..6fcf04ab 100644
--- a/core/lib/tests/strict_and_lenient_forms.rs
+++ b/core/lib/tests/strict_and_lenient_forms.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/core/lib/tests/uri-percent-encoding-issue-808.rs b/core/lib/tests/uri-percent-encoding-issue-808.rs
index f8c88597..86dee9de 100644
--- a/core/lib/tests/uri-percent-encoding-issue-808.rs
+++ b/core/lib/tests/uri-percent-encoding-issue-808.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/config/tests/development.rs b/examples/config/tests/development.rs
index 53dd3ae2..1b5753bc 100644
--- a/examples/config/tests/development.rs
+++ b/examples/config/tests/development.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/config/tests/production.rs b/examples/config/tests/production.rs
index 262c29ff..7208a7a4 100644
--- a/examples/config/tests/production.rs
+++ b/examples/config/tests/production.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/config/tests/staging.rs b/examples/config/tests/staging.rs
index e33a0517..fc88fee8 100644
--- a/examples/config/tests/staging.rs
+++ b/examples/config/tests/staging.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/content_types/src/main.rs b/examples/content_types/src/main.rs
index d6c1e1a4..83b9eda7 100644
--- a/examples/content_types/src/main.rs
+++ b/examples/content_types/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 #[macro_use] extern crate serde_derive;
diff --git a/examples/cookies/src/main.rs b/examples/cookies/src/main.rs
index a53740c1..1232def3 100644
--- a/examples/cookies/src/main.rs
+++ b/examples/cookies/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/errors/src/main.rs b/examples/errors/src/main.rs
index 1f5a24c1..3aa27066 100644
--- a/examples/errors/src/main.rs
+++ b/examples/errors/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/fairings/src/main.rs b/examples/fairings/src/main.rs
index da86f1eb..5a3efbbc 100644
--- a/examples/fairings/src/main.rs
+++ b/examples/fairings/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/form_kitchen_sink/src/main.rs b/examples/form_kitchen_sink/src/main.rs
index c73a9376..af494eaf 100644
--- a/examples/form_kitchen_sink/src/main.rs
+++ b/examples/form_kitchen_sink/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/form_validation/src/main.rs b/examples/form_validation/src/main.rs
index bddca2ae..0495409b 100644
--- a/examples/form_validation/src/main.rs
+++ b/examples/form_validation/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/handlebars_templates/src/main.rs b/examples/handlebars_templates/src/main.rs
index def582db..e2b29535 100644
--- a/examples/handlebars_templates/src/main.rs
+++ b/examples/handlebars_templates/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 #[macro_use] extern crate serde_derive;
diff --git a/examples/hello_2015/src/main.rs b/examples/hello_2015/src/main.rs
index e77a36a0..1001fb52 100644
--- a/examples/hello_2015/src/main.rs
+++ b/examples/hello_2015/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/hello_2018/src/main.rs b/examples/hello_2018/src/main.rs
index abe16b44..d8d7c473 100644
--- a/examples/hello_2018/src/main.rs
+++ b/examples/hello_2018/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[cfg(test)] mod tests;
 
diff --git a/examples/hello_person/src/main.rs b/examples/hello_person/src/main.rs
index 0bd7c999..96c4ae2e 100644
--- a/examples/hello_person/src/main.rs
+++ b/examples/hello_person/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/hello_world/src/main.rs b/examples/hello_world/src/main.rs
index de05d854..6c1111f4 100644
--- a/examples/hello_world/src/main.rs
+++ b/examples/hello_world/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/json/src/main.rs b/examples/json/src/main.rs
index 20bcb71e..65698c94 100644
--- a/examples/json/src/main.rs
+++ b/examples/json/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 #[macro_use] extern crate rocket_contrib;
diff --git a/examples/managed_queue/src/main.rs b/examples/managed_queue/src/main.rs
index 9ca56264..d0588bc6 100644
--- a/examples/managed_queue/src/main.rs
+++ b/examples/managed_queue/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/msgpack/src/main.rs b/examples/msgpack/src/main.rs
index d500ac21..2af8c51d 100644
--- a/examples/msgpack/src/main.rs
+++ b/examples/msgpack/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 #[macro_use] extern crate serde_derive;
diff --git a/examples/optional_redirect/src/main.rs b/examples/optional_redirect/src/main.rs
index c3b0c008..8c81c24a 100644
--- a/examples/optional_redirect/src/main.rs
+++ b/examples/optional_redirect/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/pastebin/src/main.rs b/examples/pastebin/src/main.rs
index 12a34e60..c561c000 100644
--- a/examples/pastebin/src/main.rs
+++ b/examples/pastebin/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/query_params/src/main.rs b/examples/query_params/src/main.rs
index 332c607f..c2ba93af 100644
--- a/examples/query_params/src/main.rs
+++ b/examples/query_params/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/ranking/src/main.rs b/examples/ranking/src/main.rs
index 26e1700d..2267fc3d 100644
--- a/examples/ranking/src/main.rs
+++ b/examples/ranking/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/raw_sqlite/src/main.rs b/examples/raw_sqlite/src/main.rs
index 60277f99..4daad628 100644
--- a/examples/raw_sqlite/src/main.rs
+++ b/examples/raw_sqlite/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/raw_upload/src/main.rs b/examples/raw_upload/src/main.rs
index 31614276..9ea67c59 100644
--- a/examples/raw_upload/src/main.rs
+++ b/examples/raw_upload/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/redirect/src/main.rs b/examples/redirect/src/main.rs
index 3df8f7bf..cfd7db27 100644
--- a/examples/redirect/src/main.rs
+++ b/examples/redirect/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/request_guard/src/main.rs b/examples/request_guard/src/main.rs
index d1085c84..91653702 100644
--- a/examples/request_guard/src/main.rs
+++ b/examples/request_guard/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/request_local_state/src/main.rs b/examples/request_local_state/src/main.rs
index 27092881..f2a3ccec 100644
--- a/examples/request_local_state/src/main.rs
+++ b/examples/request_local_state/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/session/src/main.rs b/examples/session/src/main.rs
index 416b2a06..c4de5208 100644
--- a/examples/session/src/main.rs
+++ b/examples/session/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/state/src/main.rs b/examples/state/src/main.rs
index 5109da79..9bd48352 100644
--- a/examples/state/src/main.rs
+++ b/examples/state/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/static_files/src/main.rs b/examples/static_files/src/main.rs
index 14991223..ce4a1776 100644
--- a/examples/static_files/src/main.rs
+++ b/examples/static_files/src/main.rs
@@ -1,5 +1,3 @@
-#![feature(async_await)]
-
 extern crate rocket;
 extern crate rocket_contrib;
 
diff --git a/examples/stream/src/main.rs b/examples/stream/src/main.rs
index 8a045514..20499be4 100644
--- a/examples/stream/src/main.rs
+++ b/examples/stream/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/tera_templates/src/main.rs b/examples/tera_templates/src/main.rs
index 061ef2b8..83c53122 100644
--- a/examples/tera_templates/src/main.rs
+++ b/examples/tera_templates/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 #[macro_use] extern crate serde_derive;
diff --git a/examples/testing/src/main.rs b/examples/testing/src/main.rs
index cfcaa2b1..74c2c268 100644
--- a/examples/testing/src/main.rs
+++ b/examples/testing/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/tls/src/main.rs b/examples/tls/src/main.rs
index de05d854..6c1111f4 100644
--- a/examples/tls/src/main.rs
+++ b/examples/tls/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 
diff --git a/examples/todo/src/main.rs b/examples/todo/src/main.rs
index 1e3aca37..318a13cd 100644
--- a/examples/todo/src/main.rs
+++ b/examples/todo/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 #[macro_use] extern crate diesel;
diff --git a/examples/uuid/src/main.rs b/examples/uuid/src/main.rs
index 0a0bb271..38639da9 100644
--- a/examples/uuid/src/main.rs
+++ b/examples/uuid/src/main.rs
@@ -1,4 +1,4 @@
-#![feature(proc_macro_hygiene, async_await)]
+#![feature(proc_macro_hygiene)]
 
 #[macro_use] extern crate rocket;
 #[macro_use] extern crate lazy_static;