diff --git a/.travis.yml b/.travis.yml
index b985141b..6f819af3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,9 +10,7 @@ addons:
 sudo: false
 env:
   - TOXENV=flake8
-  - TOXENV=py26-crypto
   - TOXENV=py27-crypto
-  - TOXENV=py33-crypto
   - TOXENV=py34-crypto
   - TOXENV=py35-crypto
   - TOXENV=py36-crypto
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1dd5a19a..696a6a96 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 [Unreleased][unreleased]
 -------------------------------------------------------------------------
 ### Changed
+
+- Dropped support for python 2.6 and 3.3 [#297][297]
+
 ### Fixed
 ### Added
 
diff --git a/setup.py b/setup.py
index 5bdb19f5..2e5c272c 100755
--- a/setup.py
+++ b/setup.py
@@ -60,9 +60,7 @@ def get_version(package):
         'Natural Language :: English',
         'License :: OSI Approved :: MIT License',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
diff --git a/tox.ini b/tox.ini
index 2ed7fdde..22623484 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{26,27,33,34,35,36}-crypto, py{27,35,36}-contrib_crypto, py{27,35,36}-nocrypto, flake8
+envlist = py{27,34,35,36}-crypto, py{27,35,36}-contrib_crypto, py{27,35,36}-nocrypto, flake8
 
 [testenv]
 commands =