diff --git a/ascmhl/hashlist_xml_parser.py b/ascmhl/hashlist_xml_parser.py
index 8887051..60ff973 100644
--- a/ascmhl/hashlist_xml_parser.py
+++ b/ascmhl/hashlist_xml_parser.py
@@ -362,11 +362,11 @@ def _creator_info_xml_element(hash_list: MHLHashList):
     for author in creator_info.authors:
         author_element = E.author()
         if author.role != None:
-            author_element.attrib['role'] = author.role
+            author_element.attrib["role"] = author.role
         if author.email != None:
-            author_element.attrib['email'] = author.email
+            author_element.attrib["email"] = author.email
         if author.phone != None:
-            author_element.attrib['phone'] = author.phone
+            author_element.attrib["phone"] = author.phone
         if author.name != None and author.name != "-":
             author_element.text = author.name
         info_element.append(author_element)