diff --git a/setup.py b/setup.py
index 1f13171..9a24b75 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
 
 setup(
     name="TMN_DataGen",
-    version='0.4.20',
+    version='0.4.21',
     description="Tree Matching Network Data Generator",
     author="toast",
     packages=find_packages(),