diff --git a/setup.py b/setup.py
index 4c191911ee..35b9cd7928 100644
--- a/setup.py
+++ b/setup.py
@@ -47,6 +47,7 @@
         'numba >= 0.43.0',
         'soundfile >= 0.9.0',
     ],
+    python_requires='>=3.6',
     extras_require={
         'docs': ['numpydoc', 'sphinx!=1.3.1', 'sphinx_rtd_theme',
                  'matplotlib >= 2.0.0',