diff --git a/Cargo.toml b/Cargo.toml
index 0861b5a..d44b5a8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "mos6502"
 version = "0.1.0"
 authors = ["Alexander Akhmetov <me@aleks.sh>"]
-edition = "2018"
+edition = "2021"
 
 [lib]
 name = "mos6502"