diff --git a/src/settings/settings.js b/src/settings/settings.js
index 31ab75a..b7369ca 100644
--- a/src/settings/settings.js
+++ b/src/settings/settings.js
@@ -77,6 +77,59 @@ window.onload = function () {
 				AdvSettingsFormEl.classList.add( 'hidden' );
 			}
 		};
+
+    if ( document.body.classList.contains( 'cf7-antispam-admin' ) ) {
+      const addListButton = document.querySelector('.add-list');
+      const addSelect = document.querySelector('.add-select');
+      const removeListButton = document.querySelector('.remove-list');
+      const removeSelect = document.querySelector('.remove-select');
+
+      for (const remove of removeSelect) {
+        for (const add of addSelect) {
+          if (remove.value === add.value) {
+            addSelect.removeChild(add);
+          }
+        }
+      }
+
+      addListButton.addEventListener('click', () => {
+        for (const option of addSelect.options) {
+          if (option.selected) {
+            const name = option.textContent;
+            const value = option.value;
+
+            if (!removeSelect.options[value]) {
+              const newOption = document.createElement('option');
+              newOption.setAttribute('selected', true);
+              newOption.value = value;
+              newOption.textContent = name;
+
+              removeSelect.appendChild(newOption);
+            }
+            option.remove();
+          }
+        }
+      });
+
+      removeListButton.addEventListener('click', () => {
+
+        for (const option of removeSelect.options) {
+          if (option.selected) {
+            const name = option.textContent;
+            const value = option.value;
+
+            if (!removeSelect.options[value]) {
+              const newOption = document.createElement('option');
+              newOption.value = value;
+              newOption.textContent = name;
+
+              addSelect.appendChild(newOption);
+            }
+            option.remove();
+          }
+        }
+      });
+    }
 		/* on click show advanced options */
 		document
 			.getElementById( 'enable_advanced_settings' )