diff --git a/doc/source/conf.py b/doc/source/conf.py
index 406ef92f..46a04991 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -56,9 +56,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '4.0'
+version = '4.1'
 # The full version, including alpha/beta/rc tags.
-release = '4.0'
+release = '4.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/setup.py b/setup.py
index d357eaa2..1b457f09 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 import unittest
 
 MAJOR_VERSION = 4
-MINOR_VERSION = 0
+MINOR_VERSION = 1
 
 def _run_tests():
     directory = os.path.abspath(os.path.dirname(sys.modules['__main__'].__file__))