diff --git a/libc-test/Cargo.toml b/libc-test/Cargo.toml
index df1bd04abd7d9..883dc3d43d8e9 100644
--- a/libc-test/Cargo.toml
+++ b/libc-test/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "libc-test"
 version = "0.2.151"
-edition = "2018"
+edition = "2021"
 authors = ["The Rust Project Developers"]
 license = "MIT OR Apache-2.0"
 build = "build.rs"