diff --git a/README.md b/README.md
index 802f9ea..7c4e0cd 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ React-specific guidelines described at [RingCentral React Style Guide](https://g
 1. [Language statements and features](#language-statements-and-features)
 1. [Spaces and alignments](#spaces-and-alignments)
 1. [Naming](#naming)
+1. [External libraries](#external-libraries)
 
 ## Overview
 
@@ -825,3 +826,182 @@ export class MyCompositeComponent {
     }
 }
 ```
+
+## External libraries
+
+### Prefer native js vs lodash
+
+> Reason: lodash is a great library which contains a lot of useful functions but the modern js has the short identical part of this functionality so some lodash functions are excess alternative.
+
+> Don't forget to check necessary browsers compatibility and turn on polyfills if it's needed.
+```javascript
+// BAD
+_.each([1, 2, 3], callback); 
+// GOOD
+[1, 2, 3].forEach(callback); 
+```
+```javascript
+// BAD
+_.filter([1, 2, 3], callback);
+// GOOD
+[1, 2, 3].filter(callback);
+```
+```javascript
+// BAD
+_.compact([1, 2, 3, 0, false, '']);
+// GOOD
+[1, 2, 3, 0, false, ''].filter(Boolean);
+```
+```javascript
+// BAD
+_.map([1, 2, 3], callback);
+// GOOD
+[1, 2, 3].map(callback);
+```
+```javascript
+// BAD
+_.every([1, 2, 3], callback);
+// GOOD
+[1, 2, 3].every(callback);
+```
+```javascript
+// BAD
+_.some([1, 2, 3], callback);
+// GOOD
+[1, 2, 3].some(callback);
+```
+```javascript
+// BAD
+_.reduce([1, 2, 3], callback, 0);
+// GOOD
+[1, 2, 3].reduce(callback, 0);
+```
+```javascript
+// BAD
+_.concat([1, 2, 3], [4, 5, 6]);
+// GOOD
+[1, 2, 3].concat([4, 5, 6]);
+```
+```javascript
+// BAD
+_.indexOf([1, 2, 3], 1);
+// GOOD
+[1, 2, 3].indexOf(1);
+```
+```javascript
+// BAD
+_.includes([1, 2, 3], 1);
+// GOOD
+[1, 2, 3].includes(1);
+```
+```javascript
+// BAD
+const first = _.first([1, 2, 3]);
+// GOOD
+const [first] = [1, 2, 3];
+```
+```javascript
+// BAD
+_.join([1, 2, 3], '-');
+// GOOD
+[1, 2, 3].join('-');
+```
+```javascript
+// BAD
+_.reverse([1, 2, 3]);
+// GOOD
+[1, 2, 3].reverse();
+```
+```javascript
+// BAD
+_.uniq([1, 2, 3, 3, 2]);
+// GOOD
+[...new Set([1, 2, 3, 3, 2])];
+```
+```javascript
+// BAD
+_.isArray([1, 2, 3]);
+// GOOD
+Array.isArray([1, 2, 3]);
+```
+```javascript
+// BAD
+_.size([1, 2, 3]);
+// GOOD
+[1, 2, 3].length;
+```
+```javascript
+// BAD
+_.isEmpty([]);
+// GOOD
+[].length === 0;
+````
+```javascript
+// BAD
+_.bind(func, this);
+// GOOD
+func.bind(this);
+```
+```javascript
+// BAD
+_.isNaN(value);
+// GOOD
+Number.isNaN(value);
+```
+```javascript
+// BAD
+_.isUndefined(value);
+// GOOD
+value === undefined;
+```
+```javascript
+// BAD
+_.isEmpty(object);
+// GOOD
+Object.keys(object).length === 0;
+```
+```javascript
+// BAD
+const foo = _.assign({}, object1, object2);
+// GOOD
+const foo = {
+    ...object1,
+    ...object2,
+};
+```
+```javascript
+// BAD
+const others = _.omit({a: 1, b: 2, c: 3, d: 4}, ['a', 'c']);
+// GOOD
+const {a, c, ...others} = {a: 1, b: 2, c: 3, d: 4};
+```
+```javascript
+// BAD
+_.isEmpty(object);
+// GOOD
+Object.keys(object).length === 0;
+````
+```javascript
+// BAD
+_.keys(object);
+// GOOD
+Object.keys(object);
+```
+```javascript
+// BAD
+_.values(object);
+// GOOD
+Object.values(object);
+```
+```javascript
+// BAD
+_.entries(object);
+// GOOD
+Object.entries(object);
+```
+```javascript
+// BAD
+_.trim(' 123 ');
+// GOOD
+' 123 '.trim();
+```
diff --git a/eslint-config-ringcentral/index.js b/eslint-config-ringcentral/index.js
index 90de1f8..a985fe7 100644
--- a/eslint-config-ringcentral/index.js
+++ b/eslint-config-ringcentral/index.js
@@ -15,8 +15,8 @@ module.exports = {
         },
         sourceType: 'module'
     },
-    plugins: ['react', 'import', 'ringcentral'],
-    extends: ['eslint:recommended', 'plugin:ringcentral/all'],
+    plugins: ['react', 'import', 'ringcentral', 'you-dont-need-lodash-underscore'],
+    extends: ['eslint:recommended', 'plugin:ringcentral/all', 'plugin:you-dont-need-lodash-underscore/all-warn'],
     globals: {
         chai: true,
         expect: true,
diff --git a/eslint-config-ringcentral/package.json b/eslint-config-ringcentral/package.json
index 79f0c04..c86c530 100644
--- a/eslint-config-ringcentral/package.json
+++ b/eslint-config-ringcentral/package.json
@@ -30,12 +30,14 @@
     "eslint": ">=4.1.1",
     "eslint-plugin-import": "^2.16.0",
     "eslint-plugin-react": "^7.1.0",
-    "eslint-plugin-ringcentral": "~1.0.5"
+    "eslint-plugin-ringcentral": "~1.0.5",
+    "eslint-plugin-you-dont-need-lodash-underscore": "^6.4.0"
   },
   "peerDependencies": {
     "eslint": ">=4.1.1",
     "eslint-plugin-import": "^2.16.0",
     "eslint-plugin-react": "^7.1.0",
-    "eslint-plugin-ringcentral": "~1.0.5"
+    "eslint-plugin-ringcentral": "~1.0.5",
+    "eslint-plugin-you-dont-need-lodash-underscore": "^6.4.0"
   }
 }