diff --git a/Cargo.toml b/Cargo.toml
index 2d38bd9..1a07149 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ documentation = "https://docs.rs/zbx_sender"
 keywords = ["zabbix", "zabbix-sender", "zabbix-protocol"]
 readme = "README.md"
 license = "MIT"
-edition = "2018"
+edition = "2021"
 
 [features]
 async_tokio = ["tokio"]
diff --git a/rustfmt.toml b/rustfmt.toml
deleted file mode 100644
index c51666e..0000000
--- a/rustfmt.toml
+++ /dev/null
@@ -1 +0,0 @@
-edition = "2018"
\ No newline at end of file