diff --git a/extra/appveyor/appveyor.yml b/extra/appveyor/appveyor.yml
index 319d186d6..190814124 100644
--- a/extra/appveyor/appveyor.yml
+++ b/extra/appveyor/appveyor.yml
@@ -1,7 +1,6 @@
 version: 0.11.0.{build}
 
-os:
-- Windows Server 2012 R2
+image: Visual Studio 2013
 
 shallow_clone: true