diff --git a/notes2web.py b/notes2web.py
index 0d6dae0..176e52d 100755
--- a/notes2web.py
+++ b/notes2web.py
@@ -211,7 +211,7 @@ def main(args):
         html = re.sub(r'\$raw\$', os.path.basename(filename), html)
         html = html.replace('$filehistory$', filehistory)
         with open(filename) as fp:
-            html += fp.read()
+            html += fp.read().replace("<", "&lt;").replace(">", "&gt;")
         html += TEXT_ARTICLE_TEMPLATE_FOOT
 
         with open(output_filename, 'w+') as fp: