diff --git a/src/assets/js/backend_users.js b/src/assets/js/backend_users.js
index db6f88e2..6ee23f7a 100644
--- a/src/assets/js/backend_users.js
+++ b/src/assets/js/backend_users.js
@@ -67,7 +67,7 @@ window.BackendUsers = window.BackendUsers || {};
         exports.wp.bindEventHandlers();
 
         // Fill the services and providers list boxes.
-        var html = '<div class="col-md-12">';
+        var html = '<div class="col-xs-12">';
         $.each(GlobalVariables.services, function(index, service) {
             html +=
                 '<div class="checkbox">' +
@@ -82,7 +82,7 @@ window.BackendUsers = window.BackendUsers || {};
         $('#provider-services').html(html);
         $('#provider-services').jScrollPane({ mouseWheelSpeed: 70 });
 
-        html = '<div class="col-md-12">';
+        html = '<div class="col-xs-12">';
         $.each(GlobalVariables.providers, function(index, provider) {
            html +=
                 '<div class="checkbox">' +