diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index be7d0ca..2658c98 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -14,7 +14,7 @@ jobs:
             exit 1
           fi
       - name: Install nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
         with:
           nix_path: nixpkgs=channel:nixos-23.05
       - name: Check documentation site builds
diff --git a/.github/workflows/deploy-documentation.yml b/.github/workflows/deploy-documentation.yml
index 7ae23e5..d8926c2 100644
--- a/.github/workflows/deploy-documentation.yml
+++ b/.github/workflows/deploy-documentation.yml
@@ -30,7 +30,7 @@ jobs:
       - name: Setup Pages
         uses: actions/configure-pages@v5
       - name: Install nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
         with:
           nix_path: nixpkgs=channel:nixos-23.05
       - name: Build