diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index f011996..62625eb 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -3,6 +3,7 @@
     <string name="call_api_url">https://api.kimgo.cn/api/call</string>
     <string name="message_api_url">https://api.kimgo.cn/api/sms</string>
     <string name="heart_beat_url">https://api.kimgo.cn/heartbeat</string>
+    <string name="SN">XCCS3IK75OCM</string>
     <string name="access_token">gKGCDSgWV82XbU0H</string>
     <string name="notification_title">监控服务运行中</string>
     <string name="notification_text">EchoLink正在运行</string>