diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3e5b266..70a362e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -24,7 +24,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v7
-      - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31
+      - uses: cachix/install-nix-action@13d8dd58da0234aa297dedd986986ccb8e7f3e24 # v31
       - uses: cachix/cachix-action@v17
         with:
           name: nixpkgs-python
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 8e6ac8e..1ccf0f9 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -23,7 +23,7 @@ jobs:
           persist-credentials: false
 
       - name: Install Nix
-        uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342 # v31
+        uses: cachix/install-nix-action@13d8dd58da0234aa297dedd986986ccb8e7f3e24 # v31
 
       - name: Install Cachix
         uses: cachix/cachix-action@v17