diff --git a/src/jcloud_docsgen/cli/languages/python.py b/src/jcloud_docsgen/cli/languages/python.py
index 017065f..b905416 100644
--- a/src/jcloud_docsgen/cli/languages/python.py
+++ b/src/jcloud_docsgen/cli/languages/python.py
@@ -41,7 +41,7 @@ def parse_sections_list(include_sections: Optional[list[str]] = None, exclude_se
     '''
 
     if include_sections is None:
-        include_sections = VALID_SECTIONS
+        include_sections = VALID_SECTIONS[:]
 
     for section in exclude_sections:
         while section in include_sections: