diff --git a/packages/deploy-aws/src/seagull_stack.ts b/packages/deploy-aws/src/seagull_stack.ts
index b2dc036a..c597c7bb 100644
--- a/packages/deploy-aws/src/seagull_stack.ts
+++ b/packages/deploy-aws/src/seagull_stack.ts
@@ -1,4 +1,4 @@
-import { App, Secret, SecretParameter, Stack, StackProps } from '@aws-cdk/cdk'
+import { App, RemovalPolicy, SecretParameter, Stack, StackProps } from '@aws-cdk/cdk'
 
 import { LambdaIntegration, RestApi } from '@aws-cdk/aws-apigateway'
 import * as CM from '@aws-cdk/aws-certificatemanager'
@@ -39,8 +39,8 @@ export class SeagullStack extends Stack {
     return new LogGroup(this, `${this.id}-${logGroupName}`, props)
   }
 
-  addS3(bucketName: string, role?: IAM.IPrincipal) {
-    const s3Props = { bucketName }
+  addS3(bucketName: string, role?: IAM.IPrincipal, removalPolicy?: RemovalPolicy) {
+    const s3Props = { bucketName, removalPolicy }
     const bucket = new S3.Bucket(this, `${this.id}-${bucketName}`, s3Props)
     // tslint:disable-next-line:no-unused-expression
     role && bucket.grantReadWrite(role)
diff --git a/packages/deploy-aws/src/templates/seagull_pipeline.ts b/packages/deploy-aws/src/templates/seagull_pipeline.ts
index 2a78b8ca..6e4a0d65 100644
--- a/packages/deploy-aws/src/templates/seagull_pipeline.ts
+++ b/packages/deploy-aws/src/templates/seagull_pipeline.ts
@@ -57,7 +57,7 @@ export class SeagullPipeline {
     ]
   }
 
-  async createPipeline() {
+  async createPipeline(): Promise<SeagullApp> {
     setCredsByProfile(this.profile)
     // preparations for deployment
     const isTest = this.stage === 'test'
diff --git a/packages/deploy-aws/src/templates/seagull_project.ts b/packages/deploy-aws/src/templates/seagull_project.ts
index eb1ecbe0..06ed510b 100644
--- a/packages/deploy-aws/src/templates/seagull_project.ts
+++ b/packages/deploy-aws/src/templates/seagull_project.ts
@@ -1,3 +1,4 @@
+import { RemovalPolicy } from '@aws-cdk/cdk'
 import { FS } from '@seagull/commands-fs'
 import { SDK } from 'aws-cdk'
 import * as dotenv from 'dotenv'
@@ -87,7 +88,7 @@ export class SeagullProject {
     const role = app.stack.addIAMRole('role', 'lambda.amazonaws.com', actions)
     app.role = role
     const env = await getEnv(name, this.appPath, this.stage, logBucketName)
-    const logBucket = app.stack.addS3(logBucketName, role)
+    const logBucket = app.stack.addS3(logBucketName, role, RemovalPolicy.Destroy)
     const lambda = app.stack.addLambda('lambda', this.appPath, role, env)
     const apiGW = app.stack.addUniversalApiGateway('apiGW', lambda, this.stage)
     const cloudfrontConfig = { aliasConfig, apiGateway: apiGW, logBucket }