diff --git a/lightrag/kg/neo4j_impl.py b/lightrag/kg/neo4j_impl.py
index b84a0c6a..d468427a 100644
--- a/lightrag/kg/neo4j_impl.py
+++ b/lightrag/kg/neo4j_impl.py
@@ -348,7 +348,7 @@ class Neo4JStorage(BaseGraphStorage):
 
                     degree = record["degree"]
                     logger.debug(
-                        "Neo4j query node degree for {node_id} return: {degree}"
+                        f"Neo4j query node degree for {node_id} return: {degree}"
                     )
                     return degree
                 finally: