diff --git a/appveyor.yml b/appveyor.yml
index 499e275f..a5528862 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,9 +1,9 @@
 version: 6.1.x.{build}
 image:
-- Visual Studio 2017
+  - Visual Studio 2017
 environment:
   matrix:
-  - VS_VERSION: "Visual Studio 17"
+  - VS_VERSION: "Visual Studio 15"
 build_script:
 - cmd: >-
     mkdir build