diff --git a/.github/workflows/tests-nix-macos.yml b/.github/workflows/tests-nix-macos.yml
index ede30d87..073e36f0 100644
--- a/.github/workflows/tests-nix-macos.yml
+++ b/.github/workflows/tests-nix-macos.yml
@@ -7,11 +7,11 @@ jobs:
     strategy:
       matrix:
         platform:
-          - macos-10.15
+          - macos-11
     runs-on: ${{ matrix.platform }}
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v20
+    - uses: cachix/install-nix-action@v22
       with:
           nix_path: nixpkgs=channel:nixos-unstable
     - uses: cachix/cachix-action@v12