diff --git a/Cargo.toml b/Cargo.toml
index fa22417..edc3e45 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "today"
 version = "0.1.0"
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 chrono = "0.4.19"