diff --git a/appveyor.yml b/appveyor.yml
index bcaad455..3f0e1383 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 2.21.{build}
+version: 2.21.1.{build}
 pull_requests:
   do_not_increment_build_number: true
 branches: