diff --git a/css/basic.css b/css/basic.css
index 89449ea..6554cb6 100644
--- a/css/basic.css
+++ b/css/basic.css
@@ -438,6 +438,9 @@ button::-moz-focus-inner {
     padding: 0;
 }
 
+select {
+    max-width: 100%;
+}
 optgroup {
     font-style: italic;
     font-weight: bold;