diff --git a/.github/actions/setup-nix/action.yml b/.github/actions/setup-nix/action.yml
index 92d21f1..262e5bf 100644
--- a/.github/actions/setup-nix/action.yml
+++ b/.github/actions/setup-nix/action.yml
@@ -3,8 +3,8 @@ description: "Install and configure Nix for Github Actions"
 runs:
   using: "composite"
   steps:
-    - uses: nixbuild/nix-quick-install-action@v34
-    - uses: nix-community/cache-nix-action@v7
+    - uses: nixbuild/nix-quick-install-action@2c9db80fb984ceb1bcaa77cdda3fdf8cfba92035 # v34
+    - uses: nix-community/cache-nix-action@7df957e333c1e5da7721f60227dbba6d06080569 # v7
       with:
         # restore and save a cache using this key
         primary-key: nix-${{ runner.os }}-${{ hashFiles('**/*.nix', '**/flake.lock') }}