diff --git a/fw-hestia-sdk/src/main/java/cn/fw/hestia/sdk/params/TemplateMessageParam.java b/fw-hestia-sdk/src/main/java/cn/fw/hestia/sdk/params/TemplateMessageParam.java
index 689d95d..1f0f374 100644
--- a/fw-hestia-sdk/src/main/java/cn/fw/hestia/sdk/params/TemplateMessageParam.java
+++ b/fw-hestia-sdk/src/main/java/cn/fw/hestia/sdk/params/TemplateMessageParam.java
@@ -43,6 +43,7 @@ public class TemplateMessageParam {
     /**
      * 额外展示内容
      */
+    @Size(max = 5, message = "最多展示5条额外信息")
     private Map<String, String> extraMap;
     /**
      * 备注