diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 108dc47..00a144e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
     - run: yarn build
     # check if typescript generation was committed
     - run: git diff --exit-code
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@V28
     - name: Test public cache
       uses: ./
       with:
@@ -40,7 +40,7 @@ jobs:
     - uses: actions/checkout@v4
     - run: yarn install --frozen-lockfile
     - run: yarn build
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@V28
     - name: Test public cache no signing key
       uses: ./
       with:
@@ -59,7 +59,7 @@ jobs:
     - uses: actions/checkout@v4
     - run: yarn install --frozen-lockfile
     - run: yarn build
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@V28
     - name: Test private cache
       uses: ./
       with:
@@ -78,7 +78,7 @@ jobs:
     - uses: actions/checkout@v4
     - run: yarn install --frozen-lockfile
     - run: yarn build
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@V28
     - id: paths
       run: |
         paths=$(nix-instantiate test.nix | tr '\n' ' ')
@@ -99,7 +99,7 @@ jobs:
     - uses: actions/checkout@v4
     - run: yarn install --frozen-lockfile
     - run: yarn build
-    - uses: cachix/install-nix-action@V27
+    - uses: cachix/install-nix-action@V28
     - name: Test private cache
       uses: ./
       with:
@@ -116,7 +116,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Install Nix
-      uses: cachix/install-nix-action@V27
+      uses: cachix/install-nix-action@V28
       with:
         nix_path: nixpkgs=channel:nixos-22.11
         install_url: https://nixos-nix-install-tests.cachix.org/serve/kkq45x7yrzvxq8627fi6hkswnfa7mg2l/install