diff --git a/studio/frontend/src/components/assistant-ui/attachment.tsx b/studio/frontend/src/components/assistant-ui/attachment.tsx
index 3ae1c68561..d814490c1d 100644
--- a/studio/frontend/src/components/assistant-ui/attachment.tsx
+++ b/studio/frontend/src/components/assistant-ui/attachment.tsx
@@ -238,7 +238,7 @@ export const ComposerAddAttachment: FC = () => {
         side="bottom"
         variant="ghost"
         size="icon"
-        className="aui-composer-add-attachment size-8.5 rounded-full p-1 font-semibold text-xs hover:bg-muted-foreground/15 dark:border-muted-foreground/15 dark:hover:bg-muted-foreground/30"
+        className="aui-composer-add-attachment size-8.5 rounded-full p-1 font-semibold text-xs hover:bg-muted-foreground/15 dark:hover:bg-muted-foreground/30"
         aria-label="Add Attachment"
       >
         <PlusIcon className="aui-attachment-add-icon size-5 stroke-[1.5px]" />
diff --git a/studio/frontend/src/features/chat/shared-composer.tsx b/studio/frontend/src/features/chat/shared-composer.tsx
index a811125a20..70f4311957 100644
--- a/studio/frontend/src/features/chat/shared-composer.tsx
+++ b/studio/frontend/src/features/chat/shared-composer.tsx
@@ -914,7 +914,7 @@ export function SharedComposer({
             side="bottom"
             variant="ghost"
             size="icon"
-            className="size-8.5 rounded-full p-1 font-semibold text-xs hover:bg-muted-foreground/15 dark:border-muted-foreground/15 dark:hover:bg-muted-foreground/30"
+            className="size-8.5 rounded-full p-1 font-semibold text-xs hover:bg-muted-foreground/15 dark:hover:bg-muted-foreground/30"
             onClick={() => {
               // The picker accepts both image and audio. Don't gate the
               // button on image-availability — addFiles still filters