diff --git a/lightrag/kg/faiss_impl.py b/lightrag/kg/faiss_impl.py
index d4e6ad01..c924d2ad 100644
--- a/lightrag/kg/faiss_impl.py
+++ b/lightrag/kg/faiss_impl.py
@@ -107,7 +107,7 @@ class FaissVectorDBStorage(BaseVectorStorage):
         if not data:
             return
 
-        current_time = time.time()
+        current_time = int(time.time())
 
         # Prepare data for embedding
         list_data = []
@@ -425,7 +425,7 @@ class FaissVectorDBStorage(BaseVectorStorage):
         if not metadata:
             return None
 
-        return {**metadata, "id": metadata.get("__id__")}
+        return {**metadata, "id": metadata.get("__id__"), "created_at": metadata.get("__created_at__")}
 
     async def get_by_ids(self, ids: list[str]) -> list[dict[str, Any]]:
         """Get multiple vector data by their IDs
@@ -445,7 +445,7 @@ class FaissVectorDBStorage(BaseVectorStorage):
             if fid is not None:
                 metadata = self._id_to_meta.get(fid, {})
                 if metadata:
-                    results.append({**metadata, "id": metadata.get("__id__")})
+                    results.append({**metadata, "id": metadata.get("__id__"), "created_at": metadata.get("__created_at__")})
 
         return results