diff --git a/lightrag/kg/neo4j_impl.py b/lightrag/kg/neo4j_impl.py
index 64721a49..5ffbf2bc 100644
--- a/lightrag/kg/neo4j_impl.py
+++ b/lightrag/kg/neo4j_impl.py
@@ -22,7 +22,7 @@ import pipmaster as pm
 
 if not pm.is_installed("neo4j"):
     pm.install("neo4j")
-    
+
 try:
     from neo4j import (
         AsyncGraphDatabase,
diff --git a/lightrag/kg/oracle_impl.py b/lightrag/kg/oracle_impl.py
index 1614543a..c9d8d1b5 100644
--- a/lightrag/kg/oracle_impl.py
+++ b/lightrag/kg/oracle_impl.py
@@ -363,7 +363,7 @@ class OracleVectorDBStorage(BaseVectorStorage):
     async def index_done_callback(self) -> None:
         # Oracles handles persistence automatically
         pass
-    
+
     async def delete_entity(self, entity_name: str) -> None:
         raise NotImplementedError
 
diff --git a/lightrag/kg/postgres_impl.py b/lightrag/kg/postgres_impl.py
index 193af263..5f845894 100644
--- a/lightrag/kg/postgres_impl.py
+++ b/lightrag/kg/postgres_impl.py
@@ -423,7 +423,7 @@ class PGVectorStorage(BaseVectorStorage):
     async def index_done_callback(self) -> None:
         # PG handles persistence automatically
         pass
-    
+
     async def delete_entity(self, entity_name: str) -> None:
         raise NotImplementedError