diff --git a/setup.py b/setup.py
index 4a831be..49313b2 100644
--- a/setup.py
+++ b/setup.py
@@ -57,7 +57,7 @@ def build_extensions(self):
 
 setup(
     name='nes_py',
-    version='4.0.0',
+    version='4.0.1',
     description='An NES Emulator and OpenAI Gym interface',
     long_description=README,
     long_description_content_type='text/markdown',