Be explicit about us being py3+ only in setup.py
@@ -70,7 +70,7 @@ setup(
"Intended Audience :: Science/Research",
"License :: OSI Approved :: MIT License",
"Natural Language :: English",
- "Programming Language :: Python :: 3",
+ "Programming Language :: Python :: 3 :: Only",
"Programming Language :: Python :: 3.6",
"Programming Language :: Python :: 3.7",
"Programming Language :: Python :: 3.8",
