diff --git a/lib/mysapi/tool.js b/lib/mysapi/tool.js
index 0b18e89..63ba890 100644
--- a/lib/mysapi/tool.js
+++ b/lib/mysapi/tool.js
@@ -76,7 +76,7 @@ export default class ZZZApiTool {
               getFp: {
                 url: `${this.hostPublicData}device-fp/api/getFp`,
                 body: {
-                  seed_id: `${generateSeed(16)}`,
+                  seed_id: `${generateSeed(13)}`,
                   device_id: data.deviceId,
                   platform: '1',
                   seed_time: new Date().getTime() + '',