diff --git a/src/lib.rs b/src/lib.rs
index 155a53f..4b6fcfb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,11 +1,11 @@
-#![feature(anonymous_lifetime_in_impl_trait)]
+//#![feature(anonymous_lifetime_in_impl_trait)]
 //#![feature(associated_type_defaults)]
 //#![feature(const_default)]
 //#![feature(const_option_ops)]
-#![feature(const_precise_live_drops)]
-#![feature(const_trait_impl)]
+//#![feature(const_precise_live_drops)]
+//#![feature(const_trait_impl)]
 //#![feature(impl_trait_in_assoc_type)]
-#![feature(step_trait)]
+//#![feature(step_trait)]
 //#![feature(trait_alias)]
 //#![feature(type_alias_impl_trait)]
 //#![feature(type_changing_struct_update)]