diff --git a/codegen/build.rs b/codegen/build.rs
index de393f85..3ac078ca 100644
--- a/codegen/build.rs
+++ b/codegen/build.rs
@@ -8,8 +8,8 @@ use yansi::Color::{Red, Yellow, Blue, White};
 use version_check::{supports_features, is_min_version, is_min_date};
 
 // Specifies the minimum nightly version needed to compile Rocket's codegen.
-const MIN_DATE: &'static str = "2017-09-25";
-const MIN_VERSION: &'static str = "1.22.0-nightly";
+const MIN_DATE: &'static str = "2017-11-08";
+const MIN_VERSION: &'static str = "1.23.0-nightly";
 
 fn main() {
     let ok_channel = supports_features();
diff --git a/codegen/tests/ui/typed-uris-invalid-syntax.stderr b/codegen/tests/ui/typed-uris-invalid-syntax.stderr
index ef34789f..9c27707d 100644
--- a/codegen/tests/ui/typed-uris-invalid-syntax.stderr
+++ b/codegen/tests/ui/typed-uris-invalid-syntax.stderr
@@ -62,11 +62,5 @@ error: expected expression, found `<eof>`
 20 |     uri!(simple: id = );
    |                     ^
 
-error: expected argument list after `:`
-  --> $DIR/typed-uris-invalid-syntax.rs:20:21
-   |
-20 |     uri!(simple: id = );
-   |                     ^
-
-error: aborting due to 11 previous errors
+error: aborting due to 10 previous errors