diff --git a/.github/workflows/nix-flake-check.yml b/.github/workflows/nix-flake-check.yml
index 33671cc..78bd3e1 100644
--- a/.github/workflows/nix-flake-check.yml
+++ b/.github/workflows/nix-flake-check.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: cachix/install-nix-action@v13
+      - uses: cachix/install-nix-action@v16
         with:
           install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20210604_8e6ee1b/install
           extra_nix_config: |
diff --git a/.github/workflows/nix-flake-update.yml b/.github/workflows/nix-flake-update.yml
index b73fbce..7bd520c 100644
--- a/.github/workflows/nix-flake-update.yml
+++ b/.github/workflows/nix-flake-update.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: cachix/install-nix-action@v13
+      - uses: cachix/install-nix-action@v16
         with:
           install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20210604_8e6ee1b/install
           extra_nix_config: |