diff --git a/appveyor.yml b/appveyor.yml
index 300fad98..febf8dbb 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -17,7 +17,7 @@ environment:
     #appveyor_build_worker_image: Ubuntu1804
 
   - job_name: MacOS
-    appveyor_build_worker_image: macOS
+    appveyor_build_worker_image: macos-bigsur
 
 for: