diff --git a/app/database.py b/app/database.py
index 208398a..68f5f31 100644
--- a/app/database.py
+++ b/app/database.py
@@ -18,7 +18,7 @@ def __init__(self):
         pool_size = int(db_params.get('pool_size', 25))
         max_overflow = int(db_params.get('max_overflow', 5))
 
-        self.engine = create_engine(url, poolclass=NullPool)
+        self.engine = create_engine(url, pool_size=pool_size, max_overflow=max_overflow)
 
     def check_database_connection(self):
         try: