diff --git a/docling_core/types/doc/labels.py b/docling_core/types/doc/labels.py
index 60179c47..5149df0b 100644
--- a/docling_core/types/doc/labels.py
+++ b/docling_core/types/doc/labels.py
@@ -48,6 +48,7 @@ class GroupLabel(str, Enum):
     SLIDE = "slide"
     FORM_AREA = "form_area"
     KEY_VALUE_AREA = "key_value_area"
+    COMMENT_SECTION = "comment_section"
 
     def __str__(self):
         """Get string value."""
diff --git a/docs/DoclingDocument.json b/docs/DoclingDocument.json
index 650392fa..5d1e862e 100644
--- a/docs/DoclingDocument.json
+++ b/docs/DoclingDocument.json
@@ -266,7 +266,8 @@
         "sheet",
         "slide",
         "form_area",
-        "key_value_area"
+        "key_value_area",
+        "comment_section"
       ],
       "title": "GroupLabel",
       "type": "string"