diff --git a/.travis.yml b/.travis.yml
index 18c5bee..0e7324f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,10 +4,10 @@ language: python
 sudo: false
 
 python:
-  - '3.3'
   - '3.4'
   - '3.5'
   - '3.6'
+  - '3.7-dev'
   - 'nightly'
   - 'pypy3'
 
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 91f6fda..b61ff66 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,8 @@
+Version 1.4.1
+=============
+
+Remove support for Python 3.3.
+
 Version 1.4.0 (2018-04-19)
 =====
 
diff --git a/setup.py b/setup.py
index a567085..8309699 100644
--- a/setup.py
+++ b/setup.py
@@ -42,10 +42,10 @@
         'Topic :: Security :: Cryptography',
         'Intended Audience :: Science/Research',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7'
     ],
     keywords="cryptography encryption homomorphic",
     packages=find_packages(exclude=['tests*']),