diff --git a/appveyor.yml b/appveyor.yml
index 8f5a9d8294..5c5d8b3246 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -9,8 +9,11 @@ environment:
     secure: XOgD5bJUKNOS2kDDgb+affS4pDcslxALh+xvvnr1Koy0PjXlhILsBdNhxRe0KcNm
 
 install:
-- appveyor DownloadFile http://download.xamarin.com/GTKforWindows/Windows/gtk-sharp-2.12.26.msi
-- start /wait msiexec /i gtk-sharp-2.12.26.msi /qn /norestart
+  - if not exist gtk-sharp-2.12.26.msi appveyor DownloadFile http://download.xamarin.com/GTKforWindows/Windows/gtk-sharp-2.12.26.msi
+  - msiexec /i gtk-sharp-2.12.26.msi /qn /norestart
+
+cache:
+  - gtk-sharp-2.12.26.msi
 
 configuration:
   - Release