diff --git a/flake.nix b/flake.nix
index 23ba8f6..09d8af3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,7 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
-    nix-flatpak.url = "github:gmodena/nix-flatpak/?ref=0.4.1";
+    nix-flatpak.url = "github:gmodena/nix-flatpak/?ref=v0.4.1";
   };
 
   outputs = { nixpkgs, nix-flatpak, ... }: {