diff --git a/cvat/requirements/development.txt b/cvat/requirements/development.txt
index 7c1ab6aa..5184fcd1 100644
--- a/cvat/requirements/development.txt
+++ b/cvat/requirements/development.txt
@@ -7,7 +7,6 @@ pylint==1.8.3
 pylint-django==0.9.4
 pylint-plugin-utils==0.2.6
 rope==0.11
-six==1.11.0
 wrapt==1.10.11
 django-extensions==2.0.6
 Werkzeug==0.14.1