diff --git a/requirements.txt b/requirements.txt
index 20c53dfa..464cd4ac 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ django-filter~=25.1
 django-mailer~=2.3.2
 django-oauth-toolkit~=3.0.1
 django-phonenumber-field~=8.1.0
-django-polymorphic~=3.1.0
+django-polymorphic~=4.1.0
 djangorestframework~=3.16.0
 django-rest-polymorphic~=0.1.10
 django-tables2~=2.7.5