diff --git a/setup.py b/setup.py
index 8cf98c4..8189ec3 100755
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 
 setup(
     name="bson",
-    version="0.4.0",
+    version="0.4.1",
     packages=["bson"],
     install_requires=["pytz>=2010b", "six>=1.9.0"],
     author="Ayun Park",