diff --git a/Cargo.toml b/Cargo.toml
index 0952f55..c06ab2d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ name = "async-dup"
 # - Create "v1.x.y" git tag
 version = "1.2.4"
 authors = ["Stjepan Glavina <stjepang@gmail.com>"]
-edition = "2018"
+edition = "2021"
 rust-version = "1.60"
 description = "Duplicate an async I/O handle"
 license = "Apache-2.0 OR MIT"