diff --git a/frontend/src/components/WorkspaceChat/ChatContainer/PromptInput/index.jsx b/frontend/src/components/WorkspaceChat/ChatContainer/PromptInput/index.jsx
index 795ad13349..51c730f25a 100644
--- a/frontend/src/components/WorkspaceChat/ChatContainer/PromptInput/index.jsx
+++ b/frontend/src/components/WorkspaceChat/ChatContainer/PromptInput/index.jsx
@@ -250,7 +250,7 @@ export default function PromptInput({
         onSubmit={handleSubmit}
         className="flex flex-col gap-y-1 rounded-t-lg md:w-3/4 w-full mx-auto max-w-xl items-center"
       >
-        <div className="flex items-center rounded-lg md:mb-4">
+        <div className="flex items-center rounded-lg md:mb-4 md:w-full">
           <div className="w-[95vw] md:w-[635px] bg-theme-bg-chat-input light:bg-white light:border-solid light:border-[1px] light:border-theme-chat-input-border shadow-sm rounded-2xl flex flex-col px-4 overflow-hidden">
             <AttachmentManager attachments={attachments} />
             <div className="flex items-center w-full border-b-2 border-theme-chat-input-border">