diff --git a/appveyor.yml b/appveyor.yml
index 4da4e418..cf294ba0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -2,6 +2,9 @@ environment:
   CMAKE_ARGS: ""
   NSIS_ROOT: C:\nsis
 
+configuration:
+  - Release
+
 install:
   - appveyor DownloadFile http://slproweb.com/download/Win32OpenSSL-1_0_2.exe
   - Win32OpenSSL-1_0_2.exe /silent /verysilent /sp- /suppressmsgboxes