diff --git a/db/session.py b/db/session.py
index 8e60fae..87fd776 100644
--- a/db/session.py
+++ b/db/session.py
@@ -15,7 +15,8 @@ _engine = create_async_engine(
     future=True,
     echo=False,
     pool_pre_ping=True,
-    pool_size=0,  # 0 = unlimited (NullPool equivalent for asyncpg)
+    pool_size=5,
+    max_overflow=10,
 )
 
 _Session = async_sessionmaker(