diff --git a/setup.py b/setup.py
index 174c7fec..5d4b8895 100644
--- a/setup.py
+++ b/setup.py
@@ -299,11 +299,12 @@ def run(self):
               'Intended Audience :: Science/Research',
               'Topic :: Scientific/Engineering :: Astronomy',
               'Programming Language :: Python :: 3',
+              'Programming Language :: Python :: 3.6',
               'Programming Language :: Python :: 3.7',
               'Programming Language :: Python :: 3.8',
               'Programming Language :: Python :: 3.9'
           ],
           keywords=['cosmology', 'CAMB', 'CMB'],
           install_requires=['scipy>=1.0', 'sympy>=1.0'],
-          python_requires='>=3.7'
+          python_requires='>=3.6'
           )