diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index a17b25fd..bd56b259 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.runners }}
     steps:
       - uses: actions/checkout@v5
-      - uses: cachix/install-nix-action@v31.8.2
+      - uses: cachix/install-nix-action@v31.8.4
       - uses: DeterminateSystems/magic-nix-cache-action@v13
       - name: Check flake
         run: nix flake check
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5
-      - uses: cachix/install-nix-action@v31.8.2
+      - uses: cachix/install-nix-action@v31.8.4
       - uses: DeterminateSystems/magic-nix-cache-action@v13
       - name: Build NixOS configuration
         run: nix run '.#os' -- build -L --flake '.#ci' --print-build-logs
diff --git a/.github/workflows/upgrade-deps.yaml b/.github/workflows/upgrade-deps.yaml
index 6537ebac..01a1587e 100644
--- a/.github/workflows/upgrade-deps.yaml
+++ b/.github/workflows/upgrade-deps.yaml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5
-      - uses: cachix/install-nix-action@v31.8.2
+      - uses: cachix/install-nix-action@v31.8.4
       - name: Update dependencies
         run: nix run '.#update'
       - name: Create Pull Request