diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index d6de1d5..de5df86 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -34,7 +34,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install Nix
-        uses: cachix/install-nix-action@latest
+        uses: cachix/install-nix-action@v30
 
       - name: Create update branch
         run: |