diff --git a/.github/workflows/build_nix.yml b/.github/workflows/build_nix.yml
index 27263fb..c21dbf5 100644
--- a/.github/workflows/build_nix.yml
+++ b/.github/workflows/build_nix.yml
@@ -22,7 +22,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
 
       - uses: cachix/cachix-action@v12
         with:
diff --git a/.github/workflows/update_nix.yml b/.github/workflows/update_nix.yml
index a69c403..b78faab 100644
--- a/.github/workflows/update_nix.yml
+++ b/.github/workflows/update_nix.yml
@@ -13,7 +13,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@V27
 
       - uses: cachix/cachix-action@v14
         with: