diff --git a/contrib/lib/Cargo.toml b/contrib/lib/Cargo.toml
index a1ab855d..2c7d2016 100644
--- a/contrib/lib/Cargo.toml
+++ b/contrib/lib/Cargo.toml
@@ -49,33 +49,33 @@ log = "0.4"
 # Serialization and templating dependencies.
 serde = { version = "1.0", optional = true }
 serde_json = { version = "1.0.26", optional = true }
-rmp-serde = { version = "^0.13", optional = true }
+rmp-serde = { version = "0.14.0", optional = true }
 
 # Templating dependencies.
 handlebars = { version = "2.0", optional = true }
 glob = { version = "0.3", optional = true }
-tera = { version = "0.11", optional = true }
+tera = { version = "1.0.2", optional = true }
 
 # UUID dependencies.
 uuid = { version = ">=0.7.0, <0.9.0", optional = true }
 
 # Database dependencies
 diesel = { version = "1.0", default-features = false, optional = true }
-postgres = { version = "0.15", optional = true }
+postgres = { version = "0.17", optional = true }
 r2d2 = { version = "0.8", optional = true }
-r2d2_postgres = { version = "0.14", optional = true }
-mysql = { version = "16.0", optional = true }
-r2d2_mysql = { version = "16.0", optional = true }
+r2d2_postgres = { version = "0.16", optional = true }
+mysql = { version = "17.0", optional = true }
+r2d2_mysql = { version = "17.0", optional = true }
 rusqlite = { version = "0.16.0", optional = true }
 r2d2_sqlite = { version = "0.8", optional = true }
 rusted_cypher = { version = "1", optional = true }
 r2d2_cypher = { version = "0.4", optional = true }
-redis = { version = "0.10", optional = true }
-r2d2_redis = { version = "0.9", optional = true }
+redis = { version = "0.13", optional = true }
+r2d2_redis = { version = "0.12", optional = true }
 mongodb = { version = "0.3.12", optional = true }
 r2d2-mongodb = { version = "0.2.0", optional = true }
-memcache = { version = "0.11", optional = true }
-r2d2-memcache = { version = "0.3", optional = true }
+memcache = { version = "0.14", optional = true }
+r2d2-memcache = { version = "0.5", optional = true }
 
 # SpaceHelmet dependencies
 time = { version = "0.1.40", optional = true }
diff --git a/contrib/lib/src/databases.rs b/contrib/lib/src/databases.rs
index 0270d89e..3ea4e007 100644
--- a/contrib/lib/src/databases.rs
+++ b/contrib/lib/src/databases.rs
@@ -221,7 +221,7 @@
 //! use rocket_contrib::databases::postgres;
 //!
 //! #[database("my_pg_db")]
-//! struct MyPgDatabase(postgres::Connection);
+//! struct MyPgDatabase(postgres::Client);
 //! # }
 //! ```
 //!
@@ -756,13 +756,15 @@ impl Poolable for diesel::MysqlConnection {
 
 // TODO: Come up with a way to handle TLS
 #[cfg(feature = "postgres_pool")]
-impl Poolable for postgres::Connection {
-    type Manager = r2d2_postgres::PostgresConnectionManager;
+impl Poolable for postgres::Client {
+    type Manager = r2d2_postgres::PostgresConnectionManager<postgres::tls::NoTls>;
     type Error = DbError<postgres::Error>;
 
     fn pool(config: DatabaseConfig<'_>) -> Result<r2d2::Pool<Self::Manager>, Self::Error> {
-        let manager = r2d2_postgres::PostgresConnectionManager::new(config.url, r2d2_postgres::TlsMode::None)
-            .map_err(DbError::Custom)?;
+        let manager = r2d2_postgres::PostgresConnectionManager::new(
+            config.url.parse().map_err(DbError::Custom)?,
+            postgres::tls::NoTls,
+        );
 
         r2d2::Pool::builder().max_size(config.pool_size).build(manager)
             .map_err(DbError::PoolError)
diff --git a/contrib/lib/src/templates/engine.rs b/contrib/lib/src/templates/engine.rs
index 14f5e17f..c5c9f199 100644
--- a/contrib/lib/src/templates/engine.rs
+++ b/contrib/lib/src/templates/engine.rs
@@ -30,7 +30,7 @@ pub(crate) trait Engine: Send + Sync + 'static {
 /// use rocket_contrib::templates::{Template, Engines};
 /// use rocket_contrib::templates::tera::{self, Value};
 ///
-/// fn my_filter(value: Value, _: HashMap<String, Value>) -> tera::Result<Value> {
+/// fn my_filter(value: &Value, _: &HashMap<String, Value>) -> tera::Result<Value> {
 ///     # /*
 ///     ...
 ///     # */ unimplemented!();
diff --git a/contrib/lib/src/templates/tera_templates.rs b/contrib/lib/src/templates/tera_templates.rs
index 9dcccfcf..d841b414 100644
--- a/contrib/lib/src/templates/tera_templates.rs
+++ b/contrib/lib/src/templates/tera_templates.rs
@@ -1,8 +1,9 @@
 use serde::Serialize;
+use std::error::Error;
 
 use crate::templates::{Engine, TemplateInfo};
 
-pub use crate::templates::tera::Tera;
+pub use crate::templates::tera::{Context, Tera};
 
 impl Engine for Tera {
     const EXT: &'static str = "tera";
@@ -21,8 +22,11 @@ impl Engine for Tera {
         // Finally try to tell Tera about all of the templates.
         if let Err(e) = tera.add_template_files(tera_templates) {
             error!("Failed to initialize Tera templating.");
-            for error in e.iter() {
-                info_!("{}", error);
+
+            let mut error = Some(&e as &dyn Error);
+            while let Some(err) = error {
+                info_!("{}", err);
+                error = err.source();
             }
 
             None
@@ -37,12 +41,26 @@ impl Engine for Tera {
             return None;
         };
 
-        match Tera::render(self, name, &context) {
+        let tera_ctx = match Context::from_serialize(context) {
+            Ok(ctx) => ctx,
+            Err(_) => {
+                error_!(
+                    "Error generating context when rendering Tera template '{}'.",
+                    name
+                );
+                return None;
+            }
+        };
+
+        match Tera::render(self, name, &tera_ctx) {
             Ok(string) => Some(string),
             Err(e) => {
                 error_!("Error rendering Tera template '{}'.", name);
-                for error in e.iter() {
-                    error_!("{}", error);
+
+                let mut error = Some(&e as &dyn Error);
+                while let Some(err) = error {
+                    error_!("{}", err);
+                    error = err.source();
                 }
 
                 None
diff --git a/examples/pastebin/Cargo.toml b/examples/pastebin/Cargo.toml
index e508d89e..ffd1adc7 100644
--- a/examples/pastebin/Cargo.toml
+++ b/examples/pastebin/Cargo.toml
@@ -7,4 +7,4 @@ publish = false
 
 [dependencies]
 rocket = { path = "../../core/lib" }
-rand = "0.6"
+rand = "0.7"
diff --git a/examples/todo/Cargo.toml b/examples/todo/Cargo.toml
index 21662e25..2478841f 100644
--- a/examples/todo/Cargo.toml
+++ b/examples/todo/Cargo.toml
@@ -15,8 +15,8 @@ diesel_migrations = "1.3"
 log = "0.4"
 
 [dev-dependencies]
-parking_lot = { version = "0.8", features = ["nightly"] }
-rand = "0.6"
+parking_lot = { version = "0.10", features = ["nightly"] }
+rand = "0.7"
 
 [dependencies.rocket_contrib]
 path = "../../contrib/lib"
diff --git a/examples/todo/src/tests.rs b/examples/todo/src/tests.rs
index 1553e9ef..e09a9a3a 100644
--- a/examples/todo/src/tests.rs
+++ b/examples/todo/src/tests.rs
@@ -83,7 +83,7 @@ fn test_toggle() {
 fn test_many_insertions() {
     const ITER: usize = 100;
 
-    let mut rng = thread_rng();
+    let rng = thread_rng();
     run_test!(|client, conn| {
         // Get the number of tasks initially.
         let init_num = Task::all(&conn).len();