diff --git a/src/routes/chat/[agentId]/[conversationId]/chat-box.svelte b/src/routes/chat/[agentId]/[conversationId]/chat-box.svelte
index 13ec6a4..8b46d7d 100644
--- a/src/routes/chat/[agentId]/[conversationId]/chat-box.svelte
+++ b/src/routes/chat/[agentId]/[conversationId]/chat-box.svelte
@@ -1078,6 +1078,7 @@
 								<div class="position-relative">
 									<ChatTextArea
 										className={`chat-input ${loadFileEditor ? 'chat-uploader' : ''}`}
+										maxLength={4096}
 										bind:text={text}
 										disabled={isSendingMsg || isThinking || disableAction}
 										editor={lastBotMsg?.rich_content?.editor || ''}