diff --git a/Model/Ui/CcConfigProvider.php b/Model/Ui/CcConfigProvider.php
index 8d0ce886..98a00a54 100644
--- a/Model/Ui/CcConfigProvider.php
+++ b/Model/Ui/CcConfigProvider.php
@@ -6,7 +6,6 @@
 use Magento\Payment\Model\CcConfig as MagentoCcConfig;
 use Omise\Payment\Block\Adminhtml\System\Config\CardFormCustomization\Theme;
 use Omise\Payment\Model\Config\Cc as OmiseCcConfig;
-use Omise\Payment\Model\Config\Installment;
 use Omise\Payment\Model\Customer;
 
 class CcConfigProvider implements ConfigProviderInterface
@@ -46,8 +45,6 @@ public function getConfig()
         $theme = new Theme();
         $customDesign = $this->omiseCcConfig->getCardThemeConfig();
         $selectedTheme = $this->omiseCcConfig->getCardTheme();
-        $enableWlbInstallment = $this->omiseCcConfig->getValue('enable_wlb_installment', Installment::CODE);
-
         return [
             'payment' => [
                 'ccform' => [
@@ -61,8 +58,7 @@ public function getConfig()
                     'locale'             => $this->omiseCcConfig->getStoreLocale(),
                     'secureForm'         => $this->omiseCcConfig->getSecureForm(),
                     'formDesign'         => $theme->getFormDesign($selectedTheme, $customDesign),
-                    'theme'              => $selectedTheme,
-                    'enableWlbInstallment' => $enableWlbInstallment
+                    'theme'              => $selectedTheme
                 ],
             ]
         ];
diff --git a/etc/adminhtml/system.xml b/etc/adminhtml/system.xml
index 89d2f595..94bcc458 100644
--- a/etc/adminhtml/system.xml
+++ b/etc/adminhtml/system.xml
@@ -222,19 +222,13 @@
                         <comment>This controls the title which the user sees during checkout.</comment>
                         <config_path>payment/omise_offsite_installment/title</config_path>
                     </field>
-                    <field id="enable_wlb_installment" translate="label" type="select" sortOrder="271" showInDefault="1" showInWebsite="1" showInStore="1">
-                        <label>Enable WLB installments</label>
-                        <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
-                        <config_path>payment/omise_offsite_installment/enable_wlb_installment</config_path>
-                        <comment>This controls whether you want to enable WLB installments or non-WLB installments.</comment>
-                    </field>
-                    <field id="allowspecific" translate="label comment" type="select" sortOrder="272" showInDefault="1" showInWebsite="1" showInStore="1">
+                    <field id="allowspecific" translate="label comment" type="select" sortOrder="271" showInDefault="1" showInWebsite="1" showInStore="1">
                         <label>Allowed Countries</label>
                         <config_path>payment/omise_offsite_installment/allowspecific</config_path>
                         <source_model>Magento\Payment\Model\Config\Source\Allspecificcountries</source_model>
                         <comment>If not set to all, guest customers will not have a billing country and may not be able to check out.</comment>
                     </field>
-                    <field id="specificcountry" translate="label" type="multiselect" sortOrder="273" showInDefault="1" showInWebsite="1" showInStore="1">
+                    <field id="specificcountry" translate="label" type="multiselect" sortOrder="272" showInDefault="1" showInWebsite="1" showInStore="1">
                         <label>Payment from specific countries</label>
                         <config_path>payment/omise_offsite_installment/specificcountry</config_path>
                         <source_model>Magento\Directory\Model\Config\Source\Country</source_model>
diff --git a/etc/config.xml b/etc/config.xml
index 90febfe6..6ab5366a 100644
--- a/etc/config.xml
+++ b/etc/config.xml
@@ -45,7 +45,6 @@
                 <payment_action>authorize_capture</payment_action>
                 <can_refund_partial_per_invoice>1</can_refund_partial_per_invoice>
                 <can_refund>1</can_refund>
-                <enable_wlb_installment>0</enable_wlb_installment>
             </omise_offsite_internetbanking>
 
             <omise_offsite_alipay>
diff --git a/view/frontend/web/js/view/payment/method-renderer/omise-offsite-installment-method.js b/view/frontend/web/js/view/payment/method-renderer/omise-offsite-installment-method.js
index 4741b4e3..2a0a6b77 100644
--- a/view/frontend/web/js/view/payment/method-renderer/omise-offsite-installment-method.js
+++ b/view/frontend/web/js/view/payment/method-renderer/omise-offsite-installment-method.js
@@ -165,14 +165,23 @@ define(
             },
 
             applyOmiseJsToElement: function (self, element) {
+                const iframeHeightMatching = {
+                    '40px': 258,
+                    '44px': 270,
+                    '48px': 282,
+                    '52px': 295,
+                }
+
                 const localeMatching = {
                     en_US: 'en',
                     ja_JP: 'ja',
                     th_TH: 'th'
                 }
 
-                const { locale, enableWlbInstallment } = window.checkoutConfig.payment.omise_cc
-                element.style.height = enableWlbInstallment === '1' ? '450px' : '200px'
+                const { theme, locale, formDesign } = window.checkoutConfig.payment.omise_cc
+                const { font, input, checkbox } = formDesign
+                let iframeElementHeight = iframeHeightMatching[input.height]
+                element.style.height = 500 + 'px';
 
                 OmiseCard.configure({
                     publicKey: self.getPublicKey(),
@@ -182,10 +191,9 @@ define(
                     customCardForm: false,
                     customInstallmentForm: true,
                     locale: localeMatching[locale] ?? 'en',
-                    defaultPaymentMethod: 'installment',
-                    enableWlbInstallment: enableWlbInstallment === '1'
+                    defaultPaymentMethod: 'installment'
                 });
-
+                
                 OmiseCard.open({
                     onCreateSuccess: (payload) => {
                         self.createOrder(self, payload)