diff --git a/src/epub_converter/html_epub_processor.py b/src/epub_converter/html_epub_processor.py
index 2cbdef4..f565a8b 100644
--- a/src/epub_converter/html_epub_processor.py
+++ b/src/epub_converter/html_epub_processor.py
@@ -28,6 +28,9 @@ class HtmlEpubProcessor:
         """
         # clean extra whitespace characters ([\r\n\t\f\v ])
         title = re.sub(r"[\s\xa0]", " ", title_of_chapter).strip()
+        to_replace = {"<": "&gt;", ">": "&lt;"}
+        for char in to_replace.keys():
+            title = title.replace(char, to_replace[char])
         return title
 
     @staticmethod