diff --git a/.forgejo/workflows/update-lock.yml b/.forgejo/workflows/update-lock.yml
index 6cd59b76..088f66a6 100644
--- a/.forgejo/workflows/update-lock.yml
+++ b/.forgejo/workflows/update-lock.yml
@@ -9,7 +9,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v3
       - name: Install Nix
-        uses: https://git.sysctl.io/actions/nix-installer-action@main
+        uses: https://git.sysctl.io/actions/nix-installer-action@v4
       - name: Update flake.lock
         uses: https://git.sysctl.io/actions/update-flake-lock@main
         with: