diff --git a/appveyor.yml b/appveyor.yml
index d0988ada50a..f5f621d98ea 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 2.8.13.{build}
+version: 2.8.21.{build}
 
 branches:
 # whitelist