diff --git a/lightrag/kg/neo4j_impl.py b/lightrag/kg/neo4j_impl.py
index b0839172..e9a53110 100644
--- a/lightrag/kg/neo4j_impl.py
+++ b/lightrag/kg/neo4j_impl.py
@@ -52,7 +52,7 @@ class Neo4JStorage(BaseGraphStorage):
         USERNAME = os.environ.get(
             "NEO4J_USERNAME", config.get("neo4j", "username", fallback=None)
         )
-        PASSWORD = os.environ(
+        PASSWORD = os.environ.get(
             "NEO4J_PASSWORD", config.get("neo4j", "password", fallback=None)
         )
         MAX_CONNECTION_POOL_SIZE = int(