diff --git a/appveyor.yml b/appveyor.yml
index 4e8cc9c..0ec5da7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,7 +1,7 @@
 environment:
   matrix:
     - GENERATOR: "Visual Studio 12"
-      CONFIG: Debug
+      CONFIG: Release
 
 install:
   - git submodule init