diff --git a/.appveyor.yml b/.appveyor.yml
index 54a85f57f..f1bf140e4 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -32,7 +32,7 @@ pull_requests:
 #---------------------------------#
 
 # Operating system (build VM template)
-os: Visual Studio 2015
+os: Visual Studio 2017
 
 # scripts that are called at very beginning, before repo cloning
 init: