diff --git a/bootstrap_select/static/bootstrap_select/bootstrap_select.css b/bootstrap_select/static/bootstrap_select/bootstrap_select.css
index 1b28873..115e467 100644
--- a/bootstrap_select/static/bootstrap_select/bootstrap_select.css
+++ b/bootstrap_select/static/bootstrap_select/bootstrap_select.css
@@ -5,3 +5,12 @@
 .form-row {
   overflow: visible;
 }
+
+.form-row.field-icon {
+  overflow: hidden;
+}
+
+.bootstrap-select .dropdown-menu {
+  height: 500px;
+  width: 500px;
+}
diff --git a/bootstrap_select/widgets.py b/bootstrap_select/widgets.py
index 9f5e700..defc123 100644
--- a/bootstrap_select/widgets.py
+++ b/bootstrap_select/widgets.py
@@ -19,9 +19,9 @@ def media(self):
         js = ['//cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.12.4/js/bootstrap-select.min.js', ]  # noqa
 
         if self.bootstrap_css:
-            css['all'] = ['//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css'] + css['all']  # noqa
+            css['all'] = ['//maxcdn.bootstrapcdn.com/bootstrap/5.1.3/css/bootstrap.min.css'] + css['all']  # noqa
         if self.bootstrap_js:
-            js = ['//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js'] + js
+            js = ['//maxcdn.bootstrapcdn.com/bootstrap/5.1.3/js/bootstrap.min.js'] + js
         if self.jquery_js:
             js = ['//ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js'] + js