diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index c6bc25da..f548c118 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -40,7 +40,7 @@ jobs:
         push: true
         tags: localhost:5000/tinkerbell/hook-docker:0.0
 
-    - uses: cachix/install-nix-action@v16
+    - uses: cachix/install-nix-action@v18
       with:
         nix_path: nixpkgs=channel:nixos-unstable
 
diff --git a/.github/workflows/push.yaml b/.github/workflows/push.yaml
index 65fc84f9..db982d54 100644
--- a/.github/workflows/push.yaml
+++ b/.github/workflows/push.yaml
@@ -41,7 +41,7 @@ jobs:
         push: ${{ github.actor != 'dependabot[bot]' }}
         tags: quay.io/tinkerbell/hook-docker:0.0
 
-    - uses: cachix/install-nix-action@v16
+    - uses: cachix/install-nix-action@v18
       with:
         nix_path: nixpkgs=channel:nixos-unstable