diff --git a/src/lib.rs b/src/lib.rs
index ef7f3c3812..b17e6c0b38 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,3 @@
-#![feature(generators)]
-#![feature(proc_macro_hygiene)]
 #![recursion_limit = "512"]
 
 #[macro_use]