diff --git a/src/libs/models/message.js b/src/libs/models/message.js
index f0fdee4c05ae1a745cfa9a9cbc6e32491fecff72..097ba9c4ae1fb0ce197ddc9b00b62780914362eb 100644
--- a/src/libs/models/message.js
+++ b/src/libs/models/message.js
@@ -28,6 +28,11 @@ var MessageSchema = new Schema({
     contents: {
         type: String,
         required: true
+    },
+    createdAt: {
+        type: Date,
+        required: true,
+        default: Date.now
     }
 });