diff --git a/lib/first-cdk-app-stack.ts b/lib/first-cdk-app-stack.ts
index 2fd8f74..4109498 100644
--- a/lib/first-cdk-app-stack.ts
+++ b/lib/first-cdk-app-stack.ts
@@ -20,6 +20,7 @@ export class FirstCdkAppStack extends Stack {
 
     //define lambda function and regeference function file
     const lambda_backend = new NodejsFunction(this, "function", {
+      runtime: lambda.Runtime.NODEJS_20_X,
       tracing: lambda.Tracing.ACTIVE,
       environment: {
         DYNAMODB: dynamodb_table.tableName
diff --git a/package.json b/package.json
index 830f9ad..445c98b 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "@types/jest": "^27.5.2",
     "@types/node": "10.17.27",
     "@types/prettier": "2.6.0",
-    "aws-cdk": "2.39.1",
+    "aws-cdk": "2.139.1",
     "aws-sdk": "^2.1218.0",
     "aws-xray-sdk": "^3.3.7",
     "jest": "^27.5.1",
@@ -24,7 +24,7 @@
     "typescript": "~3.9.7"
   },
   "dependencies": {
-    "aws-cdk-lib": "2.39.1",
+    "aws-cdk-lib": "2.139.1",
     "constructs": "^10.0.0",
     "source-map-support": "^0.5.21"
   }