diff --git a/mailpoet/assets/js/src/newsletter_editor/blocks/coupon/existingCoupons.tsx b/mailpoet/assets/js/src/newsletter_editor/blocks/coupon/existingCoupons.tsx
index d4a731418a..203c6c6a03 100644
--- a/mailpoet/assets/js/src/newsletter_editor/blocks/coupon/existingCoupons.tsx
+++ b/mailpoet/assets/js/src/newsletter_editor/blocks/coupon/existingCoupons.tsx
@@ -13,7 +13,7 @@ import { uniqBy } from 'lodash';
 import { MailPoet } from '../../../mailpoet';
 import { GetValueCallback, SetValueCallback } from './types';
 
-const COUPONS_PER_PAGE = 20;
+const COUPONS_PER_PAGE = 1000;
 
 export type Coupon = {
   id: number;
@@ -84,7 +84,7 @@ class ExistingCoupons extends Component<Props, State> {
         page_number: this.state.pageNumber,
         discount_type: this.state.couponFilterDiscountType,
         search: this.state.couponSearch,
-        include_coupon_id: this.state.couponId,
+        include_coupon_ids: [this.state.couponId],
       },
     })
       .then((response) => {
diff --git a/mailpoet/lib/API/JSON/v1/Coupons.php b/mailpoet/lib/API/JSON/v1/Coupons.php
index 1d349bbda2..e667c14d6e 100644
--- a/mailpoet/lib/API/JSON/v1/Coupons.php
+++ b/mailpoet/lib/API/JSON/v1/Coupons.php
@@ -9,7 +9,7 @@ use MailPoet\WooCommerce\Helper;
 use MailPoet\WP\Functions as WPFunctions;
 
 class Coupons extends APIEndpoint {
-  public const DEFAULT_PAGE_SIZE = 10;
+  public const DEFAULT_PAGE_SIZE = 100;
 
   /** @var Helper  */
   public $helper;
@@ -31,18 +31,17 @@ class Coupons extends APIEndpoint {
 
   public function getCoupons(array $data = []): SuccessResponse {
     $pageSize = $data['page_size'] ?? self::DEFAULT_PAGE_SIZE;
-    $pageNumber = $data['page_number'] ?? 0;
+    $pageNumber = $data['page_number'] ?? 1;
     $discountType = $data['discount_type'] ?? null;
     $search = $data['search'] ?? null;
-    $includeCouponId = $data['include_coupon_id'] ?? null;
-
+    $includeCouponIds = $data['include_coupon_ids'] ?? [];
     return $this->successResponse(
       $this->formatCoupons($this->helper->getCouponList(
         (int)$pageSize,
         (int)$pageNumber,
         $discountType,
         $search,
-        (int)$includeCouponId
+        $includeCouponIds
       ))
     );
   }
diff --git a/mailpoet/lib/WooCommerce/Helper.php b/mailpoet/lib/WooCommerce/Helper.php
index 21dc59fec1..b4c552a747 100644
--- a/mailpoet/lib/WooCommerce/Helper.php
+++ b/mailpoet/lib/WooCommerce/Helper.php
@@ -219,7 +219,7 @@ class Helper {
     int $pageNumber = 1,
     ?string $discountType = null,
     ?string $search = null,
-    ?int $includeCouponId = null
+    array $includeCouponIds = []
   ): array {
     $args = [
       'posts_per_page' => $pageSize,
@@ -241,9 +241,9 @@ class Helper {
 
     $includeCoupons = [];
     // We need to include the coupon with the given ID in the first page
-    if ($includeCouponId && $pageNumber === 1) {
+    if ($includeCouponIds && $pageNumber === 1) {
       $includeArgs = $args;
-      $includeArgs['include'] = [$includeCouponId];
+      $includeArgs['include'] = $includeCouponIds;
       $includeCoupons = $this->wp->getPosts($includeArgs);
     }