diff --git a/.github/workflows/flake-update.yml b/.github/workflows/flake-update.yml
index ca42c5a..0dfef28 100644
--- a/.github/workflows/flake-update.yml
+++ b/.github/workflows/flake-update.yml
@@ -19,7 +19,7 @@ jobs:
           nix develop --command \
             gomod2nix generate
       - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@v20
+        uses: DeterminateSystems/update-flake-lock@v21
         with:
           token: ${{ secrets.GH_TOKEN_FOR_FLAKE_UPDATE }}
           pr-title: "Update flake.lock"