diff --git a/.github/workflows/update-nix-flake-lock.yml b/.github/workflows/update-nix-flake-lock.yml
index 600eb4a..6b51d4c 100644
--- a/.github/workflows/update-nix-flake-lock.yml
+++ b/.github/workflows/update-nix-flake-lock.yml
@@ -19,7 +19,7 @@ jobs:
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
 
       - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@vX
+        uses: DeterminateSystems/update-flake-lock@v15
         with:
           pr-title: "Update flake.lock" # Title of PR to be created
           pr-labels: |                  # Labels to be set on the PR