diff --git a/docs/conf.py b/docs/conf.py
index 891769220..5a27944c3 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -27,7 +27,6 @@
     'sphinx.ext.autosummary',
     'sphinx.ext.mathjax',
     'sphinx.ext.viewcode',
-    'sphinxcontrib.httpdomain',
     'sphinx_rtd_theme',
 ]
 
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 2c1760e14..aaa922b78 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1 @@
 sphinx>=3.0
-sphinxcontrib-httpdomain
diff --git a/tox.ini b/tox.ini
index 3cf7efa20..1fcc90055 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,6 @@ deps =
     .
     readthedocs-sphinx-ext
     pytest
-    sphinxcontrib-httpdomain
     sphinx17: Sphinx>=1.7,<1.8
     sphinx18: Sphinx>=1.8,<1.9
     sphinx20: Sphinx>=2.0,<2.1