diff --git a/app/Merchant/Controllers/Coupon/IndexController.php b/app/Merchant/Controllers/Coupon/IndexController.php
index a94dd81..340b11e 100644
--- a/app/Merchant/Controllers/Coupon/IndexController.php
+++ b/app/Merchant/Controllers/Coupon/IndexController.php
@@ -220,13 +220,13 @@ class IndexController extends Controller
                              })
                              ->where('status', 3)
                              ->when($request->start && $request->end, function ($query) use ($request) {
-                                 $query->whereBetween('created_at', [$request->start, $request->end]);
+                                 $query->whereBetween('updated_at', [$request->start, $request->end]);
                              })
                              ->when($request->start, function ($query) use ($request) {
-                                 $query->where('created_at', '>', $request->start);
+                                 $query->where('updated_at', '>', $request->start);
                              })
                              ->when($request->end, function ($query) use ($request) {
-                                 $query->where('created_at', '<', $request->end);
+                                 $query->where('updated_at', '<', $request->end);
                              })
                              ->count();
                 break;
@@ -272,13 +272,13 @@ class IndexController extends Controller
                       $query->whereIn('status', [2, 3]);
                   })
                   ->when($request->start && $request->end, function ($query) use ($request) {
-                      $query->whereBetween('created_at', [$request->start, $request->end]);
+                      $query->whereBetween('updated_at', [$request->start, $request->end]);
                   })
                   ->when($request->start, function ($query) use ($request) {
-                      $query->where('created_at', '>', $request->start);
+                      $query->where('updated_at', '>', $request->start);
                   })
                   ->when($request->end, function ($query) use ($request) {
-                      $query->where('created_at', '<', $request->end);
+                      $query->where('updated_at', '<', $request->end);
                   })
                   ->latest()
                   ->chunk(5000, function ($coupons) use ($handle) {