bumped to version 4.21.4
diff --git a/setup.py b/setup.py
index 80e3155..603a13e 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 import os
 
-version = "4.21.3"
+version = "4.21.4"
 
 with open("requirements.txt", "r") as f:
 	install_requires = f.readlines()