diff --git a/libmat2/office.py b/libmat2/office.py
index 0298e38..3a06624 100644
--- a/libmat2/office.py
+++ b/libmat2/office.py
@@ -90,7 +90,9 @@ class MSOfficeParser(ZipParser):
             r'^(?:word|ppt|xl)/_rels/document\.xml\.rels$',
             r'^(?:word|ppt|xl)/_rels/footer[0-9]*\.xml\.rels$',
             r'^(?:word|ppt|xl)/_rels/header[0-9]*\.xml\.rels$',
-            r'^(?:word|ppt|xl)/styles.xml$',
+            r'^(?:word|ppt|xl)/styles\.xml$',
+            # TODO: randomize axId ( https://docs.microsoft.com/en-us/openspecs/office_standards/ms-oi29500/089f849f-fcd6-4fa0-a281-35aa6a432a16 )
+            r'^(?:word|ppt|xl)/charts/chart[0-9]*\.xml$',
             r'^xl//workbook.xml$',
             r'^xl//worksheets/sheet[0-9]+.xml$',
             r'^ppt/slideLayouts/_rels/slideLayout[0-9]+\.xml\.rels$',