diff --git a/setup.cfg b/setup.cfg
index 305b72a..ccb7e01 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -11,9 +11,8 @@ description-file = README.rst
 classifiers = Development Status :: 4 - Beta,
               Programming Language :: Python,
               Programming Language :: Python :: 2.7,
-              Programming Language :: Python :: 3,
-              Programming Language :: Python :: 3.3,
               Programming Language :: Python :: 3.4,
+              Programming Language :: Python :: 3.5,
               Environment :: Console,
               Intended Audience :: Education,
               Intended Audience :: Science/Research,
@@ -48,7 +47,7 @@ packages =
 
 [test]
 # py.test options when running `python setup.py test`
-addopts = 
+addopts =
   wafo/tests
   wafo/covariance/tests
   wafo/spectrum/tests