diff --git a/.github/workflows/nix-flake-check.yml b/.github/workflows/nix-flake-check.yml
index 43e2906..9680d2a 100644
--- a/.github/workflows/nix-flake-check.yml
+++ b/.github/workflows/nix-flake-check.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v17
+      - uses: cachix/install-nix-action@v18
         with:
           install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20210604_8e6ee1b/install
           extra_nix_config: |
diff --git a/.github/workflows/nix-flake-update.yml b/.github/workflows/nix-flake-update.yml
index d1b0b6c..651feb4 100644
--- a/.github/workflows/nix-flake-update.yml
+++ b/.github/workflows/nix-flake-update.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v17
+      - uses: cachix/install-nix-action@v18
         with:
           install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20210604_8e6ee1b/install
           extra_nix_config: |