diff --git a/Cargo.toml b/Cargo.toml
index 41031937..1c7320cf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,7 @@ possible intended.
 """
 keywords      = ["io", "socket", "network"]
 categories    = ["api-bindings", "network-programming"]
-edition       = "2018"
+edition       = "2021"
 include       = [
   "Cargo.toml",
   "LICENSE-APACHE",