diff --git a/proxmox-tfa/Cargo.toml b/proxmox-tfa/Cargo.toml
index 616e7aa2..4eed3b3f 100644
--- a/proxmox-tfa/Cargo.toml
+++ b/proxmox-tfa/Cargo.toml
@@ -2,7 +2,7 @@
 name = "proxmox-tfa"
 version = "2.0.0"
 authors = ["Proxmox Support Team <support@proxmox.com>"]
-edition = "2018"
+edition = "2021"
 license = "AGPL-3"
 description = "tfa implementation for totp and u2f"