diff --git a/tatsu/_config.py b/tatsu/_config.py
index 28219102..30646787 100644
--- a/tatsu/_config.py
+++ b/tatsu/_config.py
@@ -1,3 +1,3 @@
 # -*- coding: utf-8 -*-
 __toolname__ = 'TatSu'
-__version__ = '4.2.0'
+__version__ = '4.2.1'