diff --git a/.github/workflows/flake-build.yaml b/.github/workflows/flake-build.yaml
index eca9d99..8112d17 100644
--- a/.github/workflows/flake-build.yaml
+++ b/.github/workflows/flake-build.yaml
@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: cachix/install-nix-action@V27
+      - uses: cachix/install-nix-action@V28
 
       # TODO: bring back with 24.11
       # - name: build stable
diff --git a/.github/workflows/update-flakes.yaml b/.github/workflows/update-flakes.yaml
index 3233095..89bcd21 100644
--- a/.github/workflows/update-flakes.yaml
+++ b/.github/workflows/update-flakes.yaml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@V27
+      - uses: cachix/install-nix-action@V28
       - uses: DeterminateSystems/update-flake-lock@v24
         if: ${{ hashFiles('flake.nix') != '' }}
         with: