diff --git a/src/lib/components/SettingPanel/components/SerialParamSelect.svelte b/src/lib/components/SettingPanel/components/SerialParamSelect.svelte
index 0d3049e..62c0b5d 100644
--- a/src/lib/components/SettingPanel/components/SerialParamSelect.svelte
+++ b/src/lib/components/SettingPanel/components/SerialParamSelect.svelte
@@ -26,7 +26,7 @@
 <Select type="single" bind:value>
   <SelectTrigger
     {id}
-    class="w-full outline-none focus:border-base-content/20 focus-visible:border-primary focus-visible:ring-2 focus-visible:ring-primary focus-visible:ring-offset-2"
+    class="w-full shadow outline-none focus:border-base-content/20 focus-visible:border-primary focus-visible:ring-2 focus-visible:ring-primary focus-visible:ring-offset-2"
   >
     {items.find((i) => i.value === value)?.label ?? placeholder}
   </SelectTrigger>