diff --git a/lib/ingestor-api/index.ts b/lib/ingestor-api/index.ts
index 772089b..d2286c2 100644
--- a/lib/ingestor-api/index.ts
+++ b/lib/ingestor-api/index.ts
@@ -108,7 +108,7 @@ export class StacIngestor extends Construct {
     });
 
     props.table.grantReadWriteData(handler);
-    props.dataAccessRole.grant(handler.grantPrincipal, "sts:AssumeRole");
+    props.dataAccessRole.grantAssumeRole(handler_role);
 
     return handler;
   }