diff --git a/appveyor.yml b/appveyor.yml
index b585531d..24db30db 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,5 @@
 version: '{build}'
-os: Visual Studio 2015
+os: Previous Visual Studio 2015
 
 configuration:
 - Debug