diff --git a/src/nomad_material_processing/vapor_deposition/general.py b/src/nomad_material_processing/vapor_deposition/general.py
index 121ec25..741237b 100644
--- a/src/nomad_material_processing/vapor_deposition/general.py
+++ b/src/nomad_material_processing/vapor_deposition/general.py
@@ -189,8 +189,7 @@ class SubstrateHolder(Entity):
         The lab ID of the substrate holder.
         """,
         a_eln=ELNAnnotation(
-            component=ELNComponentEnum.StringEditQuantity,
-            label="holder_id"
+            component=ELNComponentEnum.StringEditQuantity, label='holder_id'
         ),
     )
     material = SubSection(section_def=PubChemPureSubstanceSection, repeats=True)