diff --git a/docs/source/conf.py b/docs/source/conf.py
index 683b2a6785b3..fa76734054ac 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -266,7 +266,6 @@
 
 intersphinx_mapping = {
     "python": ("https://docs.python.org/3", None),
-    "six": ("https://six.readthedocs.io", None),
     "attrs": ("https://www.attrs.org/en/stable/", None),
     "cython": ("https://docs.cython.org/en/latest", None),
     "monkeytype": ("https://monkeytype.readthedocs.io/en/latest", None),