diff --git a/appveyor.yml b/appveyor.yml
index 8b03c042a..44613fdaf 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -8,7 +8,7 @@ install:
   # Get the latest stable version of Node.js or io.js
   - ps: Install-Product node $env:nodejs_version
 build_script:
-  - ps: ./build.ps1
+  - ps: ./build.ps1 -Verbosity Diagnostic
   
 after_build:
 - cmd: >-