diff --git a/requirements/requirements-optionals.txt b/requirements/requirements-optionals.txt
index 241e1951d..87ae27199 100644
--- a/requirements/requirements-optionals.txt
+++ b/requirements/requirements-optionals.txt
@@ -2,3 +2,4 @@
 markdown==2.6.4
 django-guardian==1.4.3
 django-filter==0.13.0
+coreapi==1.21.0