diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cabf47b..ed18d92 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ macos-12, macos-14, ubuntu-latest ]
+        os: [ macos-13, macos-14, ubuntu-latest ]
     steps:
     - uses: actions/checkout@v4
       with:
@@ -38,7 +38,7 @@ jobs:
           nix build .#nixosConfigurations.${{ matrix.host }}.config.system.build.toplevel
 
   check_x86_64-darwin:
-    runs-on: macos-12
+    runs-on: macos-13
     steps:
     - uses: actions/checkout@v4
       with: