diff --git a/.github/workflows/nix-flake-check.yml b/.github/workflows/nix-flake-check.yml
index d42a902..2b94866 100644
--- a/.github/workflows/nix-flake-check.yml
+++ b/.github/workflows/nix-flake-check.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: cachix/install-nix-action@v18
+      - uses: cachix/install-nix-action@v19
         with:
           nix_path: nixpkgs=channel:nixos-stable
           extra_nix_config: |
diff --git a/.github/workflows/nix-flake-update.yml b/.github/workflows/nix-flake-update.yml
index 651feb4..04cc034 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@v3
-      - uses: cachix/install-nix-action@v18
+      - uses: cachix/install-nix-action@v19
         with:
           install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20210604_8e6ee1b/install
           extra_nix_config: |