diff --git a/application/api/controller/Sign.php b/application/api/controller/Sign.php
index 95f27b6..4098491 100644
--- a/application/api/controller/Sign.php
+++ b/application/api/controller/Sign.php
@@ -19,7 +19,7 @@ class Sign extends BaseCom
         $sign_coin_list = [];
         $first_value = $market_value + $sign_market_value; // 第一个值是身价加上sign_market_value
         for ($i = 0; $i < 8; $i++) {
-            $sign_coin_list[] = $first_value + $i; // 每个值在第一个值的基础上加i（0到7）
+            $sign_coin_list[] = (string)($first_value + $i); // 每个值在第一个值的基础上加i（0到7）
         }
         return v(1, '成功',  $sign_coin_list);
     }