diff --git a/src/lib.rs b/src/lib.rs
index 3796464..808c221 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
 #![feature(const_mut_refs)]
+#![feature(let_chains)]
 #![feature(const_trait_impl)]
 #![feature(core_intrinsics)]
 #![feature(const_convert)]
diff --git a/src/main.rs b/src/main.rs
index 8cea552..76c9c56 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 #![feature(const_mut_refs)]
+#![feature(let_chains)]
 #![feature(const_trait_impl)]
 #![feature(core_intrinsics)]
 #![feature(const_convert)]