diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e0d0ad4..d01f598 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v20
+    - uses: cachix/install-nix-action@v21
     - name: Add keys group (needed for go tests)
       run: sudo groupadd keys
     - name: Run unit tests
diff --git a/.github/workflows/upgrade-flakes.yml b/.github/workflows/upgrade-flakes.yml
index a45a270..1f1f737 100644
--- a/.github/workflows/upgrade-flakes.yml
+++ b/.github/workflows/upgrade-flakes.yml
@@ -10,7 +10,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Install Nix
-        uses: cachix/install-nix-action@v20
+        uses: cachix/install-nix-action@v21
         with:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}