diff --git a/.github/workflows/DNS.yml b/.github/workflows/DNS.yml
index 13066fdd..56781fff 100644
--- a/.github/workflows/DNS.yml
+++ b/.github/workflows/DNS.yml
@@ -170,7 +170,7 @@ jobs:
         ./letest.sh
 
   FreeBSD:
-    runs-on: macos-latest
+    runs-on: macos-10.15
     needs: Windows
     env:
       TEST_DNS : ${{ secrets.TEST_DNS }}
@@ -209,7 +209,7 @@ jobs:
           ./letest.sh
 
   Solaris:
-    runs-on: macos-latest
+    runs-on: macos-10.15
     needs: FreeBSD
     env:
       TEST_DNS : ${{ secrets.TEST_DNS }}