diff --git a/.github/workflows/cachix.yml b/.github/workflows/cachix.yml
index ac3f8e1..edcf9a4 100644
--- a/.github/workflows/cachix.yml
+++ b/.github/workflows/cachix.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v26
+      - uses: cachix/install-nix-action@V27
         with:
           github_access_token: '${{ secrets.GITHUB_TOKEN }}'
       - name: Cachix
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 81bc6a9..a807e61 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v26
+      - uses: cachix/install-nix-action@V27
         with:
           github_access_token: '${{ secrets.GITHUB_TOKEN }}'
       - name: Cachix