diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 71bd294..6be3d33 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@V28
+        uses: cachix/install-nix-action@v29
         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 8be6ea6..9131c9c 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@V28
+        uses: cachix/install-nix-action@v29
         with:
           nix_path: nixpkgs=channel:nixos-23.05
       - name: Build