diff --git a/appveyor.yml b/appveyor.yml
index efc7c624e..c7543a7d9 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,6 +1,6 @@
 build: false
 shallow_clone: true
-platform: x86
+platform: x86, x64
 clone_folder: c:\projects\composer
 
 cache: