diff --git a/Cargo.toml b/Cargo.toml
index 7aa06cc..4770f5a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ documentation = "https://docs.rs/duct"
 readme = "README.md"
 license = "MIT"
 keywords = ["process", "subprocess", "command", "child", "pipe"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 os_pipe = "1.0.0"