diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ff58084..452c24e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,7 +14,7 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v19
+      - uses: cachix/install-nix-action@v20
       - name: Check ${{ matrix.check }}
         # Depends on nixos/nix#7759 to simply `nix flake check`
         run: nix run .#checks.$(nix eval --raw --impure --expr "builtins.currentSystem").${{ matrix.check }}
@@ -45,7 +45,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v3
     - name: Install nix
-      uses: cachix/install-nix-action@v19
+      uses: cachix/install-nix-action@v20
     - name: Show nixpkgs version
       run: nix eval --impure --expr '(import ./flake-compat.nix { src = ./.; }).lib.version'
     - name: Setup cachix
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 2357d8f..6e55e83 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -12,7 +12,7 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v19
+      - uses: cachix/install-nix-action@v20
         with:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}