diff --git a/docs/src/lib.rs b/docs/src/lib.rs
index ac61d5b..0d2c6ba 100644
--- a/docs/src/lib.rs
+++ b/docs/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 
 pub mod page;
 pub mod string_writer;