diff --git a/appveyor.yml b/appveyor.yml
index dfc291922..1fb594cb2 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -16,7 +16,7 @@ platform:
   - x64
 
 configuration:
-  - Debug
+  - Release
 
 install:
   - cmd: git clone https://github.com/ogrisel/python-appveyor-demo