diff --git a/src/js/app-config.js b/src/js/app-config.js
index b20d371..b520f42 100644
--- a/src/js/app-config.js
+++ b/src/js/app-config.js
@@ -179,7 +179,7 @@ define(function(require) {
         outboxMailboxName: 'Outbox',
         outboxMailboxType: 'Outbox',
         connDocTimeout: 5000,
-        imapUpdateBatchSize: 100
+        imapUpdateBatchSize: 25
     };
 
     /**