diff --git a/public/js/cf7-states-cities-public.js b/public/js/cf7-states-cities-public.js
index dd72366..18b9f6f 100644
--- a/public/js/cf7-states-cities-public.js
+++ b/public/js/cf7-states-cities-public.js
@@ -17,7 +17,7 @@
 					$city_select.find( 'option:not([value=""])' ).remove();
 
 					$.each( response, function( key, city ) {
-						$city_select.append('<option value=' + city + '>' + city + '</option>');
+						$city_select.append('<option value="' + city + '">' + city + '</option>');
 					} );
 
 					$city_select.prop('disabled', false);