diff --git a/css/html_instruct_style.css b/css/html_instruct_style.css
index 72a148c3..d4780350 100644
--- a/css/html_instruct_style.css
+++ b/css/html_instruct_style.css
@@ -78,7 +78,7 @@
 
 .chat .user-message .text,
 .chat .assistant-message .text {
-    max-width: 700px;
+    max-width: 768px;
     margin-left: auto;
     margin-right: auto;
 }