diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index 2d78997ed..a6005cfe4 100644
--- a/.github/workflows/update-flake.yml
+++ b/.github/workflows/update-flake.yml
@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: cachix/install-nix-action@6004951b182f8860210c8d6f0d808ec5b1a33d28 # v25
 
-      - uses: DeterminateSystems/update-flake-lock@v20
+      - uses: DeterminateSystems/update-flake-lock@v21
         with:
           commit-msg: "chore(nix): update lockfile"
           pr-title: "chore(nix): update lockfile"