diff --git a/ChemicalSubstance/jsonld/ChemicalSubstance_v0.4-RELEASE.json b/ChemicalSubstance/jsonld/ChemicalSubstance_v0.4-RELEASE.json
index d2ab3e7..0d80029 100644
--- a/ChemicalSubstance/jsonld/ChemicalSubstance_v0.4-RELEASE.json
+++ b/ChemicalSubstance/jsonld/ChemicalSubstance_v0.4-RELEASE.json
@@ -8,7 +8,7 @@
     },
     "@graph": [
         {
-            "@id": "bioschemas:ChemicalSubstance",
+            "@id": "bioschemas:ChemicalSubstances",
             "@type": "rdfs:Class",
             "rdfs:comment": "This profile describes a ChemicalSubstance which is 'a portion of matter of constant composition, composed of molecular entities of the same type or of different types' (source: ChEBI:59999). Note, the parent class for this profile has been updated to a pending class in schema.org.",
             "rdfs:label": "ChemicalSubstance",