diff --git a/setup.py b/setup.py
index 31424f7..92bd9a3 100644
--- a/setup.py
+++ b/setup.py
@@ -26,8 +26,6 @@
     extras_require={
         'parallel':  ['dask[distributed]>=2.6.0'],
         'testing': ['flake8', 'pytest'],
-        'documentation': ['sphinx', 'nbsphinx', 'sphinxcontrib-napoleon',
-                          'autodocsumm'],
     },
     license='MIT',
     author='Daniel Schick',