diff --git a/api/core/entities/provider_configuration.py b/api/core/entities/provider_configuration.py
index 8f8bf38f58934b..214265892fca88 100644
--- a/api/core/entities/provider_configuration.py
+++ b/api/core/entities/provider_configuration.py
@@ -168,6 +168,8 @@ def add_or_update_custom_credentials(self, credentials: dict) -> None:
             db.session.add(provider_record)
             db.session.commit()
 
+        self.switch_preferred_provider_type(ProviderType.CUSTOM)
+
     def delete_custom_credentials(self) -> None:
         """
         Delete custom provider credentials.
diff --git a/api/services/audio_service.py b/api/services/audio_service.py
index 5e177427844735..2f4a73c3ac7a0c 100644
--- a/api/services/audio_service.py
+++ b/api/services/audio_service.py
@@ -36,4 +36,4 @@ def transcript(cls, tenant_id: str, file: FileStorage):
         buffer = io.BytesIO(file_content)
         buffer.name = 'temp.mp3'
 
-        return model_instance.invoke_speech2text(buffer)
+        return {"text": model_instance.invoke_speech2text(buffer)}