diff --git a/setup.py b/setup.py
index 307ad8b..4c0cc12 100755
--- a/setup.py
+++ b/setup.py
@@ -24,6 +24,7 @@ setup(
     name='twython',
     version=__version__,
     install_requires=['requests>=2.1.0', 'requests_oauthlib>=0.4.0'],
+    python_requires='>=3.5',
     author='Ryan McGrath',
     author_email='ryan@rymc.io',
     license='MIT',
@@ -41,9 +42,8 @@ setup(
         'Topic :: Software Development :: Libraries :: Python Modules',
         'Topic :: Communications :: Chat',
         'Topic :: Internet',
-        'Programming Language :: Python',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3 :: Only',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',