diff --git a/src/snek/templates/web.html b/src/snek/templates/web.html
index 9cf4c3e..8381355 100644
--- a/src/snek/templates/web.html
+++ b/src/snek/templates/web.html
@@ -136,7 +136,7 @@ chatInputField.textarea.focus();
 
 // --- Reply helper ---
 function replyMessage(message) {
-    chatInputField.value = "markdown\n> " + (message || '') + "\n";
+    chatInputField.value = "```markdown\n> " + (message || '') + "\n```\n";
     chatInputField.focus();
 }