diff --git a/lightrag/kg/postgres_impl.py b/lightrag/kg/postgres_impl.py
index 37b39b49..8fc9d590 100644
--- a/lightrag/kg/postgres_impl.py
+++ b/lightrag/kg/postgres_impl.py
@@ -161,6 +161,7 @@ class PostgreSQLDB:
                 "port": self.port,
                 "min_size": 1,
                 "max_size": self.max,
+                "statement_cache_size": 0,
             }
 
             # Add SSL configuration if provided