diff --git a/docs/conf.py b/docs/conf.py
index 02e5935e..6b5c3c1b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -29,6 +29,7 @@
     'matplotlib',
     'matplotlib.cm',
     'matplotlib.pyplot',
+    'matplotlib.colors',
     'numba',
     # 'numpy',
     'pandas',