diff --git a/dedoc/readers/docx_reader/numbering_extractor.py b/dedoc/readers/docx_reader/numbering_extractor.py
index 0bf7d22f..d7d84390 100644
--- a/dedoc/readers/docx_reader/numbering_extractor.py
+++ b/dedoc/readers/docx_reader/numbering_extractor.py
@@ -67,7 +67,10 @@ def parse(self, xml: Tag, paragraph_properties: BaseProperties, run_properties:
         else:
             ilvl = ilvl["w:val"]
 
-        lvl_info: LevelInfo = self.num_dict[num_id].level_number2level_info[ilvl]
+        try:
+            lvl_info: LevelInfo = self.num_dict[num_id].level_number2level_info[ilvl]
+        except KeyError:
+            return
         text = self.__get_list_item_text(ilvl, num_id)
 
         # change style of the paragraph/run: style -> pPr -> rPr
diff --git a/dedoc/readers/docx_reader/styles_extractor.py b/dedoc/readers/docx_reader/styles_extractor.py
index ec6a0cbf..cafd8256 100644
--- a/dedoc/readers/docx_reader/styles_extractor.py
+++ b/dedoc/readers/docx_reader/styles_extractor.py
@@ -99,7 +99,7 @@ def __get_styles_hierarchy(self, style: Tag, style_id: str, style_type: StyleTyp
 
         styles = [style]
         current_style = style
-        while current_style.basedOn:
+        while current_style and current_style.basedOn:
             try:
                 parent_style_id = current_style.basedOn["w:val"]
                 current_style = self.__find_style(parent_style_id, style_type)