diff --git a/common/src/main/java/cn/wildfirechat/messagecontentbuilder/RichNotificationContentBuilder.java b/common/src/main/java/cn/wildfirechat/messagecontentbuilder/RichNotificationContentBuilder.java
index 01455878..6936bd48 100644
--- a/common/src/main/java/cn/wildfirechat/messagecontentbuilder/RichNotificationContentBuilder.java
+++ b/common/src/main/java/cn/wildfirechat/messagecontentbuilder/RichNotificationContentBuilder.java
@@ -52,7 +52,7 @@ public class RichNotificationContentBuilder extends MessageContentBuilder{
         }
         JSONObject item = new JSONObject();
         item.put("key", key);
-        item.put("value", value);
+        item.put("value", value == null ? "" : value);
         if(!StringUtil.isNullOrEmpty(color)) {
             item.put("color", color);
         }