diff --git a/src/ontology/pato-edit.obo b/src/ontology/pato-edit.obo
index c1d5316..b954eb7 100644
--- a/src/ontology/pato-edit.obo
+++ b/src/ontology/pato-edit.obo
@@ -19867,6 +19867,7 @@ id: PATO:0010006
 name: cell morphology
 def: "A quality of a single cell inhering in the bearer by virtue of the bearer's size or shape or structure." [ORCID:0000-0002-7073-9172]
 comment: Use this term for morphologies that can *only* inhere in a cell, e.g. morphological qualities inhering in a cell by virtue of the presence, location or shape of one or more cell parts.
+subset: attribute_slim
 is_a: PATO:0000051 ! morphology
 property_value: http://purl.org/dc/terms/contributor https://orcid.org/0000-0002-7073-9172
 creation_date: 2021-01-23T11:31:53Z