diff --git a/appveyor.yml b/appveyor.yml
index 2fb3bc6..dcbe7b4 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,8 +1,8 @@
 version: 0.7.2.{build}
 skip_commits:
   files:
-    - **/*.md
-    - **/*.aip
+    - '**/*.md'
+    - '**/*.aip'
 image: Visual Studio 2017
 configuration: Release
 platform: