diff --git a/.github/workflows/flake-update.yml b/.github/workflows/flake-update.yml
index 6c67719a..2144289e 100644
--- a/.github/workflows/flake-update.yml
+++ b/.github/workflows/flake-update.yml
@@ -16,7 +16,7 @@ jobs:
           fetch-depth: 0
       - uses: DeterminateSystems/nix-installer-action@v9
       - uses: DeterminateSystems/magic-nix-cache-action@v3
-      - uses: DeterminateSystems/update-flake-lock@v20
+      - uses: DeterminateSystems/update-flake-lock@v21
         with:
           pr-title: "chore: update flake.lock"
           # Labels to be set on the PR