diff --git a/opensearch-openapi.yaml b/opensearch-openapi.yaml
index aab9e3afc..49545d266 100644
--- a/opensearch-openapi.yaml
+++ b/opensearch-openapi.yaml
@@ -39150,6 +39150,21 @@ components:
           type: boolean
       required:
         - enabled
+    _common.mapping___FlatObjectProperty:
+      allOf:
+        - $ref: '#/components/schemas/_common.mapping___PropertyBase'
+        - type: object
+          properties:
+            searchable:
+              type: boolean
+            aggregatable:
+              type: boolean
+            type:
+              type: string
+              enum:
+                - flat_object
+          required:
+            - type
     _common.mapping___FlattenedProperty:
       allOf:
         - $ref: '#/components/schemas/_common.mapping___PropertyBase'
@@ -39618,6 +39633,7 @@ components:
         - $ref: '#/components/schemas/_common.mapping___DenseVectorProperty'
         - $ref: '#/components/schemas/_common.mapping___SparseVectorProperty'
         - $ref: '#/components/schemas/_common.mapping___FlattenedProperty'
+        - $ref: '#/components/schemas/_common.mapping___FlatObjectProperty'
         - $ref: '#/components/schemas/_common.mapping___NestedProperty'
         - $ref: '#/components/schemas/_common.mapping___ObjectProperty'
         - $ref: '#/components/schemas/_common.mapping___CompletionProperty'