diff --git a/requirements/base.txt b/requirements/base.txt
index a8748d6..5781ed7 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -4,6 +4,7 @@ ruamel.yaml>=0.15.34
 inflection>=0.3.1
 six>=1.10.0
 uritemplate>=3.0.0
+packaging
 
 djangorestframework>=3.8
 Django>=1.11.7