diff --git a/backend/go-service/config/config.dev.yaml b/backend/go-service/config/config.dev.yaml
index e4a4b5c..937806e 100644
--- a/backend/go-service/config/config.dev.yaml
+++ b/backend/go-service/config/config.dev.yaml
@@ -88,3 +88,5 @@ meeting:
   empty_room_ttl_seconds: 300       # 空房自动销毁 TTL（秒），期间有人加入可复活
   cleanup_interval_seconds: 30      # 兜底扫描周期（秒），定时任务检查过期 grace/empty_ttl key
   stale_room_hours: 4               # 活跃超过此小时且无活跃成员视为 stale，强制结束
+# webhook 共享密钥：必须与 go-service 端 INTERNAL_WEBHOOK_SECRET 一致，否则 go-service 直接 403
+INTERNAL_WEBHOOK_SECRET: internal-webhook-12xqs
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