diff --git a/setup.py b/setup.py
index c74a96174c374ac5441520d8b03a09db7d98a5d6..70d7d68094221aa479b1b8f0c13f7bb8719b09a6 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@ except LookupError:
 from setuptools import setup, Extension
 import glob, os, shutil, fnmatch, platform, sys
 
-version = '2.4.21'
+version = '2.4.22'
 
 
 def generate_content():