diff --git a/langchain/retrievers/chatgpt_plugin_retriever.py b/langchain/retrievers/chatgpt_plugin_retriever.py
index 4655d5ea..e0f3f13c 100644
--- a/langchain/retrievers/chatgpt_plugin_retriever.py
+++ b/langchain/retrievers/chatgpt_plugin_retriever.py
@@ -28,7 +28,10 @@ class ChatGPTPluginRetriever(BaseRetriever, BaseModel):
         docs = []
         for d in results:
             content = d.pop("text")
-            docs.append(Document(page_content=content, metadata=d))
+            metadata = d.pop("metadata", d)
+            if metadata.get("source_id"):
+                metadata["source"] = metadata.pop("source_id")
+            docs.append(Document(page_content=content, metadata=metadata))
         return docs
 
     async def aget_relevant_documents(self, query: str) -> List[Document]:
@@ -48,7 +51,10 @@ class ChatGPTPluginRetriever(BaseRetriever, BaseModel):
         docs = []
         for d in results:
             content = d.pop("text")
-            docs.append(Document(page_content=content, metadata=d))
+            metadata = d.pop("metadata", d)
+            if metadata.get("source_id"):
+                metadata["source"] = metadata.pop("source_id")
+            docs.append(Document(page_content=content, metadata=metadata))
         return docs
 
     def _create_request(self, query: str) -> tuple[str, dict, dict]: