diff --git a/nucleus/Cargo.toml b/nucleus/Cargo.toml
index 1693763..34e33da 100644
--- a/nucleus/Cargo.toml
+++ b/nucleus/Cargo.toml
@@ -10,7 +10,7 @@ readme = "README.md"
 license = "BlueOak-1.0.0"
 categories = ["no-std", "embedded", "os"]
 publish = false
-edition = "2018"
+edition = "2021"
 
 [badges]
 maintenance = { status = "experimental" }