diff --git a/nixos/modules/misc/version.nix b/nixos/modules/misc/version.nix
index d582e0c162de..29e9498018ec 100644
--- a/nixos/modules/misc/version.nix
+++ b/nixos/modules/misc/version.nix
@@ -135,7 +135,7 @@ in
       };
 
       version = lib.mkOption {
-        type = types.nullOr (types.strMatching "^[a-z0-9._-]+$");
+        type = types.nullOr (types.strMatching "^[a-z0-9._-~^]+$");
         default = null;
         description = ''
           Image version.