diff --git a/requirements-development.txt b/requirements-development.txt
index 52a7c54e..4e6a178c 100644
--- a/requirements-development.txt
+++ b/requirements-development.txt
@@ -12,6 +12,5 @@ recommonmark
 Sphinx
 sphinx_rtd_theme
 tox
-mock
 django-debug-toolbar
 packaging==16.8