diff --git a/package.json b/package.json
index cddb2d5..88fd127 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "build"
   ],
   "engines": {
-    "node": ">= 14"
+    "node": ">= 14.18.0"
   },
   "scripts": {
     "test": "make clean && make && make pretest && make test",
@@ -23,7 +23,7 @@
     "preversion": "npm run build"
   },
   "devDependencies": {
-    "@types/node": "^16.11.62",
+    "@types/node": "^18.11.18",
     "@types/tar-fs": "^2.0.1",
     "clean-modules": "^2.0.6",
     "typescript": "^4.8.3"
diff --git a/source/index.ts b/source/index.ts
index 3f74607..0cc3d09 100644
--- a/source/index.ts
+++ b/source/index.ts
@@ -1,8 +1,8 @@
-import { access, createWriteStream, existsSync, mkdirSync, symlink } from 'fs';
-import { IncomingMessage } from 'http';
+import { access, createWriteStream, existsSync, mkdirSync, symlink } from 'node:fs';
+import { IncomingMessage } from 'node:http';
 import LambdaFS from './lambdafs';
-import { join } from 'path';
-import { URL } from 'url';
+import { join } from 'node:path';
+import { URL } from 'node:url';
 
 /** Viewport taken from https://github.com/puppeteer/puppeteer/blob/main/docs/api/puppeteer.viewport.md */
 interface Viewport {
@@ -37,7 +37,7 @@ interface Viewport {
   hasTouch?: boolean;
 }
 
-if (/^AWS_Lambda_nodejs(?:10|12|14|16|18)[.]x$/.test(process.env.AWS_EXECUTION_ENV) === true) {
+if ( process.env.AWS_EXECUTION_ENV !== undefined && /^AWS_Lambda_nodejs(?:14|16|18)[.]x$/.test(process.env.AWS_EXECUTION_ENV) === true) {
   if (process.env.FONTCONFIG_PATH === undefined) {
     process.env.FONTCONFIG_PATH = '/tmp/aws';
   }
@@ -208,7 +208,7 @@ class Chromium {
       LambdaFS.inflate(`${input}/swiftshader.tar.br`),
     ];
 
-    if (/^AWS_Lambda_nodejs(?:10|12|14|16|18)[.]x$/.test(process.env.AWS_EXECUTION_ENV) === true) {
+    if (process.env.AWS_EXECUTION_ENV !== undefined && /^AWS_Lambda_nodejs(?:14|16|18)[.]x$/.test(process.env.AWS_EXECUTION_ENV) === true) {
       promises.push(LambdaFS.inflate(`${input}/aws.tar.br`));
     }
 
diff --git a/source/lambdafs.ts b/source/lambdafs.ts
index f0cb1f8..de95eab 100644
--- a/source/lambdafs.ts
+++ b/source/lambdafs.ts
@@ -1,8 +1,8 @@
-import { createReadStream, createWriteStream, existsSync } from 'fs';
-import { tmpdir } from 'os';
-import { basename, join } from 'path';
+import { createReadStream, createWriteStream, existsSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { basename, join } from 'node:path';
 import { extract } from 'tar-fs';
-import { createBrotliDecompress, createUnzip } from 'zlib';
+import { createBrotliDecompress, createUnzip } from 'node:zlib';
 
 class LambdaFS {
   /**