diff --git a/.travis.yml b/.travis.yml
index 97aae61..faafa24 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,6 @@ python:
   - 3.6
   - 3.5
   - 3.4
-  - 3.3
   - 2.7
 
 matrix:
@@ -18,4 +17,4 @@ matrix:
 install: pip install -U tox-travis
 
 # command to run tests, e.g. python setup.py test
-script: tox
\ No newline at end of file
+script: tox
diff --git a/setup.py b/setup.py
index a1a5df3..10b3aa6 100644
--- a/setup.py
+++ b/setup.py
@@ -54,5 +54,5 @@
     test_suite='tests',
     tests_require=test_requirements,
     setup_requires=setup_requirements,
-    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*",
+    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
 )
diff --git a/tox.ini b/tox.ini
index 4aa51f8..465a864 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py33, py34, py35, py36, flake8, docs
+envlist = py27, py34, py35, py36, flake8, docs
 skip_missing_interpreters = true
 
 [travis]
@@ -7,7 +7,6 @@ python =
     3.6: py36
     3.5: py35
     3.4: py34
-    3.3: py33
     2.7: py27
 
 [testenv:flake8]