diff --git a/usecases/blea-guest-ecs-app-sample/lib/construct/canary.ts b/usecases/blea-guest-ecs-app-sample/lib/construct/canary.ts
index 29754a04a..d1ffe37ca 100644
--- a/usecases/blea-guest-ecs-app-sample/lib/construct/canary.ts
+++ b/usecases/blea-guest-ecs-app-sample/lib/construct/canary.ts
@@ -50,7 +50,7 @@ export class Canary extends Construct {
       }),
       // It's recommended that use the latest runtime version.
       // See: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch_Synthetics_Canaries_Library.html
-      runtime: synthetics.Runtime.SYNTHETICS_NODEJS_PUPPETEER_3_5,
+      runtime: synthetics.Runtime.SYNTHETICS_NODEJS_PUPPETEER_6_0,
       environmentVariables: {
         TARGETHOST: props.appEndpoint,
         TARGETPATH: '/',
diff --git a/usecases/blea-guest-ecs-app-sample/lib/construct/datastore.ts b/usecases/blea-guest-ecs-app-sample/lib/construct/datastore.ts
index 3c7334c99..ca7ef9352 100644
--- a/usecases/blea-guest-ecs-app-sample/lib/construct/datastore.ts
+++ b/usecases/blea-guest-ecs-app-sample/lib/construct/datastore.ts
@@ -35,16 +35,28 @@ export class Datastore extends Construct {
       //   version: rds.AuroraMysqlEngineVersion.VER_2_09_1
       // }),
       credentials: rds.Credentials.fromGeneratedSecret('dbadmin'),
-      instanceProps: {
+      vpcSubnets: {
+        subnetType: SubnetType.PRIVATE_ISOLATED,
+      },
+      vpc: props.vpc,
+      writer: rds.ClusterInstance.provisioned('Instance1', {
+        instanceIdentifier: 'Datastore1',
         instanceType: InstanceType.of(InstanceClass.T3, InstanceSize.MEDIUM),
-        vpcSubnets: {
-          subnetType: SubnetType.PRIVATE_ISOLATED,
-        },
-        vpc: props.vpc,
         enablePerformanceInsights: true,
         performanceInsightEncryptionKey: props.cmk,
         performanceInsightRetention: rds.PerformanceInsightRetention.DEFAULT, // 7 days
-      },
+        isFromLegacyInstanceProps: true,
+      }),
+      readers: [
+        rds.ClusterInstance.provisioned('Instance2', {
+          instanceIdentifier: 'Datastore2',
+          instanceType: InstanceType.of(InstanceClass.T3, InstanceSize.MEDIUM),
+          enablePerformanceInsights: true,
+          performanceInsightEncryptionKey: props.cmk,
+          performanceInsightRetention: rds.PerformanceInsightRetention.DEFAULT, // 7 days
+          isFromLegacyInstanceProps: true,
+        }),
+      ],
       removalPolicy: RemovalPolicy.SNAPSHOT,
       defaultDatabaseName: 'mydb',
       storageEncrypted: true,
diff --git a/usecases/blea-guest-ecs-app-sample/test/__snapshots__/blea-guest-ecs-app-sample.test.ts.snap b/usecases/blea-guest-ecs-app-sample/test/__snapshots__/blea-guest-ecs-app-sample.test.ts.snap
index edc847613..1b5886b36 100644
--- a/usecases/blea-guest-ecs-app-sample/test/__snapshots__/blea-guest-ecs-app-sample.test.ts.snap
+++ b/usecases/blea-guest-ecs-app-sample/test/__snapshots__/blea-guest-ecs-app-sample.test.ts.snap
@@ -4059,7 +4059,7 @@ exports[`Snapshot test for BLEA ECS App Stacks 3`] = `
             "TARGETPATH": "/",
           },
         },
-        "RuntimeVersion": "syn-nodejs-puppeteer-3.5",
+        "RuntimeVersion": "syn-nodejs-puppeteer-6.0",
         "Schedule": {
           "DurationInSeconds": "0",
           "Expression": "rate(1 minute)",