diff --git a/app/Models/Activity.php b/app/Models/Activity.php
index ca1eb28..e68d96e 100644
--- a/app/Models/Activity.php
+++ b/app/Models/Activity.php
@@ -99,7 +99,7 @@ class Activity extends Model
     public function grant($mobile, $outletId = null)
     {
         try {
-            $code = '66406' . date('ymd') . mt_rand(100000, 999999);
+            $code = '66406' . date('ymdH') . mt_rand(1000000, 9999999);
 
             if ($this->type == SELF::TYPE_EXTEND) {
                 $start_at = now();
diff --git a/packages/coupon/src/Coupon.php b/packages/coupon/src/Coupon.php
index 8618d26..f7cca38 100644
--- a/packages/coupon/src/Coupon.php
+++ b/packages/coupon/src/Coupon.php
@@ -2,9 +2,7 @@
 
 namespace XuanChen\Coupon;
 
-use App\Models\Activity;
 use App\Models\User;
-use Illuminate\Support\Facades\DB;
 
 /**
  * 自有卡券系统