diff --git a/cms/envs/common.py b/cms/envs/common.py
index 754e6e9755..1bdd61623d 100644
--- a/cms/envs/common.py
+++ b/cms/envs/common.py
@@ -2668,6 +2668,11 @@ REGISTRATION_EXTRA_FIELDS = {
 }
 EDXAPP_PARSE_KEYS = {}
 
+############## NOTIFICATIONS EXPIRY ##############
+NOTIFICATIONS_EXPIRY = 60
+EXPIRED_NOTIFICATIONS_DELETE_BATCH_SIZE = 10000
+NOTIFICATION_CREATION_BATCH_SIZE = 99
+
 ############################ AI_TRANSLATIONS ##################################
 AI_TRANSLATIONS_API_URL = 'http://localhost:18760/api/v1'