diff --git a/README.rst b/README.rst
index 0a87175..50932f3 100644
--- a/README.rst
+++ b/README.rst
@@ -1,7 +1,7 @@
 QuantiPhy - Physical Quantities
 ===============================
 
-| Version: 0.3.4
+| Version: 0.4.0
 | Released: 2016-10-26
 
 .. image:: https://img.shields.io/travis/KenKundert/quantiphy/master.svg
diff --git a/quantiphy.py b/quantiphy.py
index 8ec289c..4b5576a 100644
--- a/quantiphy.py
+++ b/quantiphy.py
@@ -79,7 +79,7 @@
 
 
 # Constants {{{1
-__version__ = '0.3.4'
+__version__ = '0.4.0'
 __released__ = '2016-10-26'
 
 # These mappings are only used when reading numbers
diff --git a/setup.py b/setup.py
index 8407bc2..2a66171 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 
 setup(
     name='quantiphy',
-    version='0.3.4',
+    version='0.4.0',
     description='physical quantities (numbers with units)',
     long_description=readme,
     author="Ken Kundert",
@@ -26,7 +26,7 @@
     ],
     classifiers=[
         #'Development Status :: 5 - Production/Stable',
-        'Development Status :: 4 - Beta',
+        'Development Status :: 5 - Production/Stable',
         'Intended Audience :: Developers',
         'Intended Audience :: Science/Research',
         'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',