diff --git a/.eslintrc.node9.js b/.eslintrc.node9.js
new file mode 100644
index 00000000..5d43d6fd
--- /dev/null
+++ b/.eslintrc.node9.js
@@ -0,0 +1,13 @@
+const base = require('./.eslintrc.js');
+
+module.exports = {
+  ...base,
+  plugins: [...new Set([...(base.plugins || []), 'node'])],
+  rules: {
+    ...base.rules,
+    'node/no-unsupported-features/es-syntax': ['error', {
+      version: '>=9.0.0',
+      ignores: ['modules']
+    }]
+  }
+};
diff --git a/package.json b/package.json
index 4c82341c..eb924c4e 100644
--- a/package.json
+++ b/package.json
@@ -11,29 +11,30 @@
   },
   "main": "cloudinary.js",
   "dependencies": {
-    "lodash": "^4.17.21"
+    "lodash": "^4.17.23"
   },
   "devDependencies": {
-    "@types/expect.js": "^0.3.29",
-    "@types/mocha": "^7.0.2",
-    "@types/node": "^13.5.0",
-    "date-fns": "^2.16.1",
-    "dotenv": "4.x",
-    "dtslint": "^0.9.1",
+    "@types/expect.js": "^0.3.32",
+    "@types/mocha": "^10.0.10",
+    "@types/node": "^22.9.3",
+    "date-fns": "^2.30.0",
+    "dotenv": "^8.2.0",
+    "dtslint": "^2.0.6",
     "eslint": "^6.8.0",
     "eslint-config-airbnb-base": "^14.2.1",
-    "eslint-plugin-import": "^2.20.2",
-    "expect.js": "0.3.x",
-    "glob": "^7.1.6",
+    "eslint-plugin-import": "^2.32.0",
+    "eslint-plugin-node": "^11.1.0",
+    "expect.js": "^0.3.1",
+    "glob": "^7.2.3",
     "jsdoc": "^4.0.4",
-    "jsdom": "^9.12.0",
-    "jsdom-global": "2.1.1",
-    "mocha": "^6.2.3",
-    "nyc": "^14.1.1",
-    "rimraf": "^3.0.0",
-    "sinon": "^6.1.4",
-    "typescript": "^3.7.5",
-    "webpack-cli": "^3.2.1"
+    "jsdom": "^15.2.1",
+    "jsdom-global": "^3.0.2",
+    "mocha": "^7.2.0",
+    "nyc": "^15.1.0",
+    "rimraf": "^3.0.2",
+    "sinon": "^9.2.4",
+    "typescript": "^4.9.5",
+    "webpack-cli": "^3.3.12"
   },
   "files": [
     "lib/**/*",
diff --git a/test/setup.js b/test/setup.js
index 33c63230..66ac7fc2 100644
--- a/test/setup.js
+++ b/test/setup.js
@@ -1,4 +1,6 @@
-require('dotenv').load({
+const dotenv = require('dotenv');
+const dotenvInit = typeof dotenv.config === 'function' ? dotenv.config : dotenv.load;
+dotenvInit({
   silent: true
 });
 
diff --git a/test/testUtils/testConstants.js b/test/testUtils/testConstants.js
index ca2f5e0e..ed118880 100644
--- a/test/testUtils/testConstants.js
+++ b/test/testUtils/testConstants.js
@@ -1,4 +1,6 @@
-require('dotenv').load({
+const dotenv = require('dotenv');
+const dotenvInit = typeof dotenv.config === 'function' ? dotenv.config : dotenv.load;
+dotenvInit({
   silent: true
 });
 const UNIQUE_JOB_SUFFIX_ID = process.env.TRAVIS_JOB_ID || Math.floor(Math.random() * 999999);
diff --git a/tools/createTestCloud.js b/tools/createTestCloud.js
index f70cdeaa..5950589e 100644
--- a/tools/createTestCloud.js
+++ b/tools/createTestCloud.js
@@ -31,7 +31,9 @@ function setup() {
       fs.writeFileSync(`tools/cloudinary_url.sh`, URL); // This is needed for Travis
       fs.writeFileSync(ENV_FILE_PATH, URL); // This is needed for local develoepr tests
 
-      require('dotenv').load();
+      const dotenv = require('dotenv');
+      const dotenvInit = typeof dotenv.config === 'function' ? dotenv.config : dotenv.load;
+      dotenvInit();
 
       cloudinary.config(true);
 
@@ -58,4 +60,3 @@ function setup() {
 }
 setup();
 
-
diff --git a/tools/scripts/lint.sh b/tools/scripts/lint.sh
index 85686db5..e2c8b288 100755
--- a/tools/scripts/lint.sh
+++ b/tools/scripts/lint.sh
@@ -2,3 +2,5 @@
 set -e;
 
 eslint ./test ./lib
+# Enforce source syntax compatibility with the oldest supported runtime.
+eslint --config .eslintrc.node9.js ./cloudinary.js ./lib
diff --git a/types/cloudinary_ts_spec.ts b/types/cloudinary_ts_spec.ts
index 6fead38a..d046009d 100644
--- a/types/cloudinary_ts_spec.ts
+++ b/types/cloudinary_ts_spec.ts
@@ -900,7 +900,7 @@ cloudinary.v2.uploader.upload("ftp://user1:mypass@ftp.example.com/sample.jpg",
         console.log(result, error);
     });
 
-// $ExpectType Promise<UploadApiResponse> | UploadStream
+// $ExpectType UploadStream | Promise<UploadApiResponse>
 cloudinary.v2.uploader.upload_large("my_large_video.mp4",
     {
         resource_type: "video",
@@ -910,7 +910,7 @@ cloudinary.v2.uploader.upload_large("my_large_video.mp4",
         console.log(result, error);
     });
 
-// $ExpectType Promise<UploadApiResponse> | UploadStream
+// $ExpectType UploadStream | Promise<UploadApiResponse>
 cloudinary.v2.uploader.upload_large("my_large_video.mp4",
     {resource_type: "video"},
     function (error, result) {