diff --git a/.github/workflows/flake.yaml b/.github/workflows/flake.yaml
index f19422f..9602b6a 100644
--- a/.github/workflows/flake.yaml
+++ b/.github/workflows/flake.yaml
@@ -12,7 +12,7 @@ jobs:
         uses: actions/checkout@v4
       - uses: nixbuild/nix-quick-install-action@v26
       - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@v20
+        uses: DeterminateSystems/update-flake-lock@v21
         with:
           token: ${{ secrets.FLAKE_LOCK_UPDATE_TOKEN }}
           pr-reviewers: sumnerevans