diff --git a/runtimes/nodejs/src/handler/invoke.ts b/runtimes/nodejs/src/handler/invoke.ts
index e0589bfb93..735d5a3be4 100644
--- a/runtimes/nodejs/src/handler/invoke.ts
+++ b/runtimes/nodejs/src/handler/invoke.ts
@@ -12,7 +12,7 @@ import {
   FunctionDebugExecutor,
 } from '../support/engine'
 import pako from 'pako'
-import { base64ToUint8Array, uint8ArrayToBase64 } from '../support/utils'
+import { base64ToUint8Array, isObject, uint8ArrayToBase64 } from '../support/utils'
 
 export async function handleInvokeFunction(req: IRequest, res: Response) {
   const name = req.params?.name
@@ -90,7 +90,7 @@ async function invokeFunction(
 
     // reject request if interceptor return false
     if (
-      typeof result.data === 'object' &&
+      isObject(result.data) &&
       result.data.__type__ === '__interceptor__' &&
       result.data.__res__ == false
     ) {
@@ -200,7 +200,7 @@ async function invokeDebug(
 
     // reject request if interceptor return false
     if (
-      typeof result.data === 'object' &&
+      isObject(result.data) &&
       result.data.__type__ === '__interceptor__' &&
       result.data.__res__ == false
     ) {
diff --git a/runtimes/nodejs/src/support/engine/console.ts b/runtimes/nodejs/src/support/engine/console.ts
index d9739c89df..a629b1742b 100644
--- a/runtimes/nodejs/src/support/engine/console.ts
+++ b/runtimes/nodejs/src/support/engine/console.ts
@@ -2,6 +2,7 @@ import * as util from 'util'
 import chalk from 'chalk'
 import { padStart } from 'lodash'
 import Config from '../../config'
+import { isObject } from '../utils'
 
 enum LogLevel {
   DEBUG = 'DEBUG',
@@ -31,7 +32,7 @@ export class Console {
     let content = params
       .map((param) => {
         if (typeof param === 'string') return this._colorize(level, param)
-        if (typeof param === 'object') {
+        if (isObject(param)) {
           return this._colorize(
             level,
             util.inspect(param, { depth: Config.LOG_DEPTH, colors: true }),
diff --git a/runtimes/nodejs/src/support/utils.ts b/runtimes/nodejs/src/support/utils.ts
index 6fddd7cfbf..a771b04542 100644
--- a/runtimes/nodejs/src/support/utils.ts
+++ b/runtimes/nodejs/src/support/utils.ts
@@ -68,7 +68,7 @@ export function deepFreeze(object: Object) {
   for (const name of propNames) {
     const value = object[name]
 
-    if (value && typeof value === 'object') {
+    if (isObject(value)) {
       deepFreeze(value)
     }
   }
@@ -114,4 +114,13 @@ export function uint8ArrayToBase64(buffer: Uint8Array) {
 export function base64ToUint8Array(base64: string) {
   const buffer = Buffer.from(base64, 'base64')
   return new Uint8Array(buffer)
-}
\ No newline at end of file
+}
+
+/**
+ * is object.
+ * @param obj
+ * @returns
+ */
+export function isObject(obj: unknown): obj is Object {
+  return obj !== null && typeof obj === 'object'
+}