bumped to version 6.21.6
diff --git a/erpnext/__version__.py b/erpnext/__version__.py
index 5440c3d..4e3fa17 100644
--- a/erpnext/__version__.py
+++ b/erpnext/__version__.py
@@ -1,2 +1,2 @@
 from __future__ import unicode_literals
-__version__ = '6.21.5'
+__version__ = '6.21.6'