diff --git a/requirements/requirements.in b/requirements/requirements.in
index d6d790fd..b855f9cc 100644
--- a/requirements/requirements.in
+++ b/requirements/requirements.in
@@ -69,3 +69,4 @@ sqlparse>=0.4.4
 
 # Dynamic settings
 django-constance
+django-picklefield  # Required by django-constance for database backend