diff --git a/Cargo.toml b/Cargo.toml
index 159b5ad..5ef08ab 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["wtklbm <wtklbm@gmail.com>"]
 description = "crm can help you easy and fast switch between different cargo registries, now include: sjtu, tuna, ustc, rsproxy, bfsu, nju, hit."
 homepage = "https://github.com/wtklbm/crm"
 repository = "https://github.com/wtklbm/crm.git"
-edition = "2018"
+edition = "2021"
 license = "MIT OR Apache-2.0"
 keywords = ["cargo", "registry"]
 exclude = [".vscode/**"]