diff --git a/packages/api/src/schema/ai-api-schema.yaml b/packages/api/src/schema/ai-api-schema.yaml
index 8c426511c..92c96c01d 100644
--- a/packages/api/src/schema/ai-api-schema.yaml
+++ b/packages/api/src/schema/ai-api-schema.yaml
@@ -643,7 +643,8 @@ components:
     AudioResponse:
       properties:
         audio:
-          $ref: '#/components/schemas/MediaURL'
+          allOf:
+            - $ref: '#/components/schemas/MediaURL'
           description: The generated audio.
       type: object
       required:
@@ -963,7 +964,8 @@ components:
     HTTPError:
       properties:
         detail:
-          $ref: '#/components/schemas/APIError'
+          allOf:
+            - $ref: '#/components/schemas/APIError'
           description: Detailed error information.
       type: object
       required:
@@ -1013,9 +1015,11 @@ components:
           title: Finish Reason
           default: ''
         delta:
-          $ref: '#/components/schemas/LLMMessage'
+          allOf:
+            - $ref: '#/components/schemas/LLMMessage'
         message:
-          $ref: '#/components/schemas/LLMMessage'
+          allOf:
+            - $ref: '#/components/schemas/LLMMessage'
       type: object
       required:
         - index
@@ -1146,7 +1150,6 @@ components:
             the `params` argument.
           default: ''
         params:
-          additionalProperties: true
           type: object
           title: Params
           description: Initial parameters for the pipeline.