diff --git a/codegen/build.rs b/codegen/build.rs
index 4946eabd..0e444cf9 100644
--- a/codegen/build.rs
+++ b/codegen/build.rs
@@ -8,7 +8,7 @@ use ansi_term::Color::{Red, Yellow, Blue, White};
 use version_check::{is_nightly, is_min_version, is_min_date};
 
 // Specifies the minimum nightly version needed to compile Rocket's codegen.
-const MIN_DATE: &'static str = "2017-03-30";
+const MIN_DATE: &'static str = "2017-04-15";
 const MIN_VERSION: &'static str = "1.18.0-nightly";
 
 // Convenience macro for writing to stderr.