diff --git a/appveyor.yml b/appveyor.yml
index cfa6b0ccbf..eced37d77e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,7 +1,7 @@
 version: 1.0.{build}
 branches:
   only:
-- master
+  - master
 image: Visual Studio 2017
 configuration: Release
 build_script: