diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 462edadd..7978ba90 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,7 +27,7 @@ jobs:
         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 }}
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index ea7eacbf..963aa2a7 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -49,7 +49,7 @@ jobs:
           fetch-depth: 0
 
       - name: Install nix
-        uses: cachix/install-nix-action@v20
+        uses: cachix/install-nix-action@v21
         with:
           extra_nix_config: |
             experimental-features = nix-command flakes
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 6b0aadd3..ee5339cf 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -17,7 +17,7 @@ jobs:
           fetch-depth: 0
 
       - name: Install nix
-        uses: cachix/install-nix-action@v20
+        uses: cachix/install-nix-action@v21
         with:
           extra_nix_config: |
             experimental-features = nix-command flakes