diff --git a/.travis.yml b/.travis.yml
index 17444c3..62ea617 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,9 +5,7 @@ language: python
 python:
   - "3.5"
   - "3.4"
-  - "3.3"
   - "2.7"
-  - "2.6"
   - "pypy"
 
 # command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 45f8fdd..b314f93 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -99,7 +99,7 @@ Before you submit a pull request, check that it meets these guidelines:
 2. If the pull request adds functionality, the docs should be updated. Put
    your new functionality into a function with a docstring, and add the
    feature to the list in README.rst.
-3. The pull request should work for Python 2.6, 2.7, 3.3, and 3.4, 3.5, and for PyPy. Check
+3. The pull request should work for Python 2.7, and 3.4, 3.5, and for PyPy. Check
    https://travis-ci.org/bndr/pipreqs/pull_requests
    and make sure that the tests pass for all supported Python versions.
 
diff --git a/setup.py b/setup.py
index 50d81a3..1c11f94 100755
--- a/setup.py
+++ b/setup.py
@@ -45,10 +45,8 @@ setup(
         'License :: OSI Approved :: Apache Software License',
         'Natural Language :: English',
         "Programming Language :: Python :: 2",
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
     ],
diff --git a/tox.ini b/tox.ini
index de01ff3..ec48e79 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py26, py27, py33, py34, py35
+envlist = py27, py34, py35
 
 [testenv]
 setenv =