diff --git a/requirements-devel.txt b/requirements-devel.txt
index 673505a..b991f73 100644
--- a/requirements-devel.txt
+++ b/requirements-devel.txt
@@ -1,6 +1,4 @@
 # requirements for a development environment
 -e .[devel]
-mock
 sphinx
 sphinx_rtd_theme
-docutils<0.18