diff --git a/setup.py b/setup.py
index 68885b2f..c3519635 100755
--- a/setup.py
+++ b/setup.py
@@ -48,6 +48,7 @@
     include_package_data=True,
     zip_safe=False,
     license='MPL-2.0',
+    python_requires=">=3.5",
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Intended Audience :: Developers',
@@ -55,8 +56,6 @@
         'Natural Language :: English',
         'Programming Language :: Python',
         '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',