diff --git a/src/html_preprocessor.py b/src/html_preprocessor.py
index 71496f7..dd9208a 100644
--- a/src/html_preprocessor.py
+++ b/src/html_preprocessor.py
@@ -280,7 +280,7 @@ class HTMLPreprocessor:
         a_tags_with_href = self.body_tag.find_all('a', {'href': re.compile('^(?!#sdfootnote)')})
         for tag in a_tags_with_href:
             tag.string = tag.text.replace('\u200c', '')
-            tag.string = tag.text.replace('\u200b', '')
+            tag.string = tag.text.replace('\u200b', '')  # zero-width-space
             tag['href'] = tag.attrs.get('href').replace('%E2%80%8C', '')
 
     @staticmethod