diff --git a/main.py b/main.py
index fd03988..5d974db 100644
--- a/main.py
+++ b/main.py
@@ -31,7 +31,7 @@ def home():
 <div class="message">
 {}
 </div>
-""".format(m.content)
+""".format(m.content.replace('<','&lt;').replace('>','&gt;'))
 
     return body