diff --git a/appveyor.yml b/appveyor.yml
index 4d0de54f..1e7544b1 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,7 +1,7 @@
 image:
-#  - macos-monterey
-  - Ubuntu2004
-#  - Visual Studio 2015
+  - macos-bigsur
+  - Ubuntu2016
+  - Visual Studio 2015
 
 platform:
   - x86