diff --git a/schema/collectingEvent.yml b/schema/collectingEvent.yml
index 7f9b679..c6574eb 100644
--- a/schema/collectingEvent.yml
+++ b/schema/collectingEvent.yml
@@ -379,21 +379,21 @@ components:
                   description: The date and time the geographic place name source detail record was recorded on.
             geographicThesaurus:
               type: object
-                nullable: true
-                properties:
-                  source:
-                    enum: [TGN]
-                    description: Source of the geographic thesaurus
-                  subjectId:
-                    type: string
-                  preferredTerm:
-                    type: string
-                  preferredParent:
-                    type: string
-                    nullable: true
-                  additionalParents:
-                    type: array
-                    nullable: true
+              nullable: true
+              properties:
+                source:
+                  enum: [TGN]
+                  description: Source of the geographic thesaurus
+                subjectId:
+                  type: string
+                preferredTerm:
+                  type: string
+                preferredParent:
+                  type: string
+                  nullable: true
+                additionalParents:
+                  type: array
+                  nullable: true
             tags:
               type: array
               nullable: true