diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 78726ac..76441de 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v30
+    - uses: cachix/install-nix-action@v31
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - uses: cachix/cachix-action@v15
diff --git a/.github/workflows/update-flake-inputs.yml b/.github/workflows/update-flake-inputs.yml
index ba3311f..b79911c 100644
--- a/.github/workflows/update-flake-inputs.yml
+++ b/.github/workflows/update-flake-inputs.yml
@@ -11,7 +11,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Install Nix
-        uses: cachix/install-nix-action@v30
+        uses: cachix/install-nix-action@v31
         with:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}