diff --git a/postgres/cdk/lib/giant.ts b/postgres/cdk/lib/giant.ts
index 4a5af3ac..ee05e550 100644
--- a/postgres/cdk/lib/giant.ts
+++ b/postgres/cdk/lib/giant.ts
@@ -52,6 +52,7 @@ export class Giant extends GuStack {
 			engine: DatabaseInstanceEngine.postgres({
 				version: PostgresEngineVersion.VER_15
 			}),
+            allowMajorVersionUpgrade: true,
 			allocatedStorage: dbStorage,
 			maxAllocatedStorage: dbStorage + 20,
 			autoMinorVersionUpgrade: true,