diff --git a/chat_box/views.py b/chat_box/views.py
index 49e5a4d..deffafa 100644
--- a/chat_box/views.py
+++ b/chat_box/views.py
@@ -120,6 +120,8 @@ def post_message(request):
     ret = {'msg': 'posted'}
     if request.method != 'POST':
         return HttpResponseBadRequest()
+    if len(request.POST['body']) > 5000:
+        return HttpResponseBadRequest()
 
     room = None
     if request.POST['room']:
diff --git a/templates/chat/chat.html b/templates/chat/chat.html
index da0dc96..e1fb66d 100644
--- a/templates/chat/chat.html
+++ b/templates/chat/chat.html
@@ -614,7 +614,7 @@ let META_HEADER = [
                 </div>
                 <div style="height: 15%">
                     <a id="emoji-button" href="#" title="{{_('Emoji')}}"><i class="icofont-slightly-smile"></i></a>
-                    <textarea id="chat-input" placeholder="{{_('Enter your message')}}"></textarea>
+                    <textarea maxlength="5000" id="chat-input" placeholder="{{_('Enter your message')}}"></textarea>
                 </div>
                 <div class="tooltip" role="tooltip">
                     <emoji-picker></emoji-picker>