diff --git a/stack/hlsconstructs/rds.py b/stack/hlsconstructs/rds.py
index 2e089d3..28af6bb 100644
--- a/stack/hlsconstructs/rds.py
+++ b/stack/hlsconstructs/rds.py
@@ -59,7 +59,7 @@ def __init__(
             "RdsCluster",
             engine="aurora-postgresql",
             engine_mode="serverless",
-            engine_version="11.18",
+            engine_version="12.15",
             database_name="hls",
             db_subnet_group_name=self.subnet_group.ref,
             enable_http_endpoint=True,