diff --git a/docs/conf.py b/docs/conf.py
index f7e86b3..d94470c 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -18,7 +18,6 @@ sys.path.append(os.path.abspath('_ext'))
 extensions = [
     'sphinx.ext.autodoc',
     'sphinx.ext.intersphinx',
-    'sphinxcontrib.httpdomain',
     'doc_extensions',
 ]
 templates_path = ['_templates']