diff --git a/business/model/message.go b/business/model/message.go
index 628756f97..5efb4023c 100644
--- a/business/model/message.go
+++ b/business/model/message.go
@@ -24,7 +24,7 @@ type Message struct {
 	ModelIDCULD
 	Type    int8   `json:"type"`
 	Title   string `json:"title"`
-	Content string `json:"content"`
+	Content string `orm:"type(text)" json:"content"`
 }
 
 func (*Message) TableIndex() [][]string {