diff --git a/src/pyplaml/diagram_note.py b/src/pyplaml/diagram_note.py
index 17ed0f7e879ac4270f57d951b4f907cc5d14160d..e7e608ea24a31bafb70a83c1b4418f46a6a4b8ad 100644
--- a/src/pyplaml/diagram_note.py
+++ b/src/pyplaml/diagram_note.py
@@ -5,6 +5,7 @@ from .diagram_object import DiagramObject
 
 
 class DiagramNote(DiagramObject):
+    """Diagram object, which represents a note, can be attached to another diagram object."""
 
     def __init__(self, name: str, text: str, **kwargs):
         super().__init__(name, **kwargs)