diff --git a/appveyor.yml b/appveyor.yml
index 5c99135..59f1f0b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -25,6 +25,7 @@ environment:
 
 test_script:
   - sh: |
+      chmod -R 777 /appveyor/projects
       npm install
       npm run test
       if [ $? -ne 0 ]; then