diff --git a/setup.py b/setup.py
index 9127c6a697..36f57b257e 100644
--- a/setup.py
+++ b/setup.py
@@ -103,7 +103,7 @@ def build_extension(self, ext):
 
 kwargs = {}
 
-version = "5.1.1 "
+version = "5.1.1"
 
 with open('README.rst') as f:
     kwargs['long_description'] = f.read()