diff --git a/appveyor.yml b/appveyor.yml
index f71aae55..6983df94 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -26,4 +26,4 @@ build_script:
   - msbuild -m -p:BuildInParallel=true -p:Configuration=Release ALL_BUILD.vcxproj
 
 cache:
-  - c:\projects\vcpkg
+  - c:\projects\vcpkg\installed