diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 04c7eeb..4f08b0e 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -16,4 +16,4 @@ jobs:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
       - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@v20
+        uses: DeterminateSystems/update-flake-lock@v21