diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 940bb01..07936e8 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -20,7 +20,7 @@ jobs:
     - name: run make
       run: make -j2 -C src
   macosbuild:
-    runs-on: macos-13
+    runs-on: macos-12
     steps:
     - uses: actions/checkout@v4
     - name: Set up Homebrew
@@ -33,7 +33,7 @@ jobs:
     - name: Install Qt dependencies
       uses: jurplel/install-qt-action@v4
       with:
-        version: 5.15.16
+        version: 5.15.2
         target: 'desktop'
         arch: 'clang_64'        
     - name: run qmake