diff --git a/Cargo.toml b/Cargo.toml
index 3db6d86..577a8b2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ name = "vopono"
 description = "Launch applications via VPN tunnels using temporary network namespaces"
 version = "0.9.0"
 authors = ["James McMurray <jamesmcm03@gmail.com>"]
-edition = "2018"
+edition = "2021"
 license = "GPL-3.0-or-later"
 repository = "https://github.com/jamesmcm/vopono"
 homepage = "https://github.com/jamesmcm/vopono"