diff --git a/.eslintrc b/.eslintrc
new file mode 100644
index 0000000..94a0b14
--- /dev/null
+++ b/.eslintrc
@@ -0,0 +1,41 @@
+{
+  "env": {
+    "es6": true,
+    "mocha": true,
+    "node": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 2018
+  },
+  "globals": {
+    "Promise": true
+  },
+  "rules": {
+    "no-bitwise": 2,
+    "curly": 2,
+    "eqeqeq": 2,
+    "no-unused-expressions": 2,
+    "strict": 0,
+    "wrap-iife": [
+      2,
+      "any"
+    ],
+    "indent": [
+      2,
+      2,
+      {
+        "SwitchCase": 1
+      }
+    ],
+    "no-use-before-define": 0,
+    "new-cap": 2,
+    "no-caller": 2,
+    "require-yield": 2,
+    "quotes": [
+      2,
+      "single"
+    ],
+    "no-undef": 2,
+    "no-unused-vars": 2
+  }
+}
diff --git a/.jshintignore b/.jshintignore
deleted file mode 100644
index 3c3629e..0000000
--- a/.jshintignore
+++ /dev/null
@@ -1 +0,0 @@
-node_modules
diff --git a/.jshintrc b/.jshintrc
deleted file mode 100644
index 0cb361a..0000000
--- a/.jshintrc
+++ /dev/null
@@ -1,29 +0,0 @@
-{
-  "bitwise": true,
-  "browser": true,
-  "curly": true,
-  "eqeqeq": true,
-  "esnext": true,
-  "expr": true,
-  "globalstrict": false,
-  "globals": {
-    "Promise": true
-  },
-  "immed": true,
-  "indent": 2,
-  "jquery": true,
-  "latedef": false,
-  "mocha": true,
-  "newcap": true,
-  "noarg": true,
-  "node": true,
-  "noyield": true,
-  "quotmark": "single",
-  "regexp": true,
-  "smarttabs": true,
-  "strict": false,
-  "trailing": false,
-  "undef": true,
-  "unused": true,
-  "white": false
-}
diff --git a/.travis.yml b/.travis.yml
index 1ba9eef..7e0f182 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,8 @@
 language: node_js
 
 node_js:
-  - 4
-  - 4.0
   - 6
-  - 6.0
-  - 7
-  - 7.0
   - 8
-  - 8.0
+  - 10
 
 sudo: false
diff --git a/examples/mongodb/model.js b/examples/mongodb/model.js
index 1dc6a1f..cd992df 100755
--- a/examples/mongodb/model.js
+++ b/examples/mongodb/model.js
@@ -90,16 +90,16 @@ module.exports.saveToken = function(token, client, user) {
   // Can't just chain `lean()` to `save()` as we did with `findOne()` elsewhere. Instead we use `Promise` to resolve the data.
   return new Promise( function(resolve,reject){
     accessToken.save(function(err,data){
-      if( err ) reject( err );
-      else resolve( data );
+      if( err ) {reject( err );}
+      else {resolve( data );}
     }) ;
   }).then(function(saveResult){
     // `saveResult` is mongoose wrapper object, not doc itself. Calling `toJSON()` returns the doc.
-    saveResult = saveResult && typeof saveResult == 'object' ? saveResult.toJSON() : saveResult;
+    saveResult = saveResult && typeof saveResult === 'object' ? saveResult.toJSON() : saveResult;
     
     // Unsure what else points to `saveResult` in oauth2-server, making copy to be safe
     var data = new Object();
-    for( var prop in saveResult ) data[prop] = saveResult[prop];
+    for( var prop in saveResult ) {data[prop] = saveResult[prop];}
     
     // /oauth-server/lib/models/token-model.js complains if missing `client` and `user`. Creating missing properties.
     data.client = data.clientId;
diff --git a/examples/postgresql/model.js b/examples/postgresql/model.js
index ef95404..72aa03c 100644
--- a/examples/postgresql/model.js
+++ b/examples/postgresql/model.js
@@ -27,7 +27,7 @@ module.exports.getAccessToken = function(bearerToken) {
  * Get client.
  */
 
-module.exports.getClient = function *(clientId, clientSecret) {
+module.exports.getClient = function(clientId, clientSecret) {
   return pg.query('SELECT client_id, client_secret, redirect_uri FROM oauth_clients WHERE client_id = $1 AND client_secret = $2', [clientId, clientSecret])
     .then(function(result) {
       var oAuthClient = result.rows[0];
@@ -48,7 +48,7 @@ module.exports.getClient = function *(clientId, clientSecret) {
  * Get refresh token.
  */
 
-module.exports.getRefreshToken = function *(bearerToken) {
+module.exports.getRefreshToken = function(bearerToken) {
   return pg.query('SELECT access_token, access_token_expires_on, client_id, refresh_token, refresh_token_expires_on, user_id FROM oauth_tokens WHERE refresh_token = $1', [bearerToken])
     .then(function(result) {
       return result.rowCount ? result.rows[0] : false;
@@ -59,7 +59,7 @@ module.exports.getRefreshToken = function *(bearerToken) {
  * Get user.
  */
 
-module.exports.getUser = function *(username, password) {
+module.exports.getUser = function(username, password) {
   return pg.query('SELECT id FROM users WHERE username = $1 AND password = $2', [username, password])
     .then(function(result) {
       return result.rowCount ? result.rows[0] : false;
@@ -70,7 +70,7 @@ module.exports.getUser = function *(username, password) {
  * Save token.
  */
 
-module.exports.saveAccessToken = function *(token, client, user) {
+module.exports.saveAccessToken = function(token, client, user) {
   return pg.query('INSERT INTO oauth_tokens(access_token, access_token_expires_on, client_id, refresh_token, refresh_token_expires_on, user_id) VALUES ($1, $2, $3, $4)', [
     token.accessToken,
     token.accessTokenExpiresOn,
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..1f34f17
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1817 @@
+{
+  "name": "express-oauth-server",
+  "version": "2.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0.tgz",
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+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.0.0"
+      }
+    },
+    "@babel/highlight": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.0.0.tgz",
+      "integrity": "sha512-UFMC4ZeFC48Tpvj7C8UgLvtkaUuovQX+5xNWrsIoMG8o2z+XFKjKaN9iVmS84dPwVN00W4wPmqvYoZF3EGAsfw==",
+      "dev": true,
+      "requires": {
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
+      }
+    },
+    "accepts": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
+      "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
+      "requires": {
+        "mime-types": "~2.1.18",
+        "negotiator": "0.6.1"
+      }
+    },
+    "acorn": {
+      "version": "5.7.3",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.3.tgz",
+      "integrity": "sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==",
+      "dev": true
+    },
+    "acorn-jsx": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-4.1.1.tgz",
+      "integrity": "sha512-JY+iV6r+cO21KtntVvFkD+iqjtdpRUpGqKWgfkCdZq1R+kbreEl8EcdcJR4SmiIgsIQT33s6QzheQ9a275Q8xw==",
+      "dev": true,
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+      }
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+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.5.3.tgz",
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+        "fast-deep-equal": "^2.0.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
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+      "dev": true
+    },
+    "ansi-regex": {
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+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+      "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
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+        "ajv-keywords": "^3.0.0",
+        "chalk": "^2.1.0",
+        "lodash": "^4.17.4",
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+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
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+      }
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+      "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=",
+      "dev": true
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
+    },
+    "write": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz",
+      "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
+      "dev": true,
+      "requires": {
+        "mkdirp": "^0.5.1"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
index 67a6106..2d78c99 100644
--- a/package.json
+++ b/package.json
@@ -4,8 +4,8 @@
   "description": "OAuth provider for express",
   "main": "index.js",
   "scripts": {
-    "lint": "jshint .",
-    "test": "mocha --recursive test"
+    "pretest": "eslint . --fix",
+    "test": "mocha --recursive --exit test"
   },
   "repository": {
     "type": "git",
@@ -22,19 +22,19 @@
   },
   "license": "SEE LICENSE IN LICENSE",
   "dependencies": {
-    "bluebird": "^3.0.5",
+    "bluebird": "^3.5.2",
     "express": "^4.13.3",
-    "oauth2-server": "3.0.0"
+    "oauth2-server": "^3.0.1"
   },
   "devDependencies": {
-    "body-parser": "^1.14.1",
-    "jshint": "^2.8.0",
-    "mocha": "^2.3.3",
+    "body-parser": "^1.18.3",
+    "eslint": "^5.5.0",
+    "mocha": "^5.2.0",
     "should": "^7.1.0",
     "sinon": "^1.14.1",
-    "supertest": "^0.15.0"
+    "supertest": "^3.3.0"
   },
   "engines": {
-    "node": ">=0.11"
+    "node": ">=6"
   }
 }
diff --git a/test/integration/index_test.js b/test/integration/index_test.js
index 91f91b7..0567ad1 100644
--- a/test/integration/index_test.js
+++ b/test/integration/index_test.js
@@ -108,9 +108,9 @@ describe('ExpressOAuthServer', function() {
       request(app.listen())
         .get('/')
         .set('Authorization', 'Bearer foobar')
-        .expect(200, function(err, res){
-            spy.called.should.be.True();
-            done(err);
+        .expect(200, function(err){
+          spy.called.should.be.true();
+          done(err);
         });
     });
   });
@@ -146,9 +146,9 @@ describe('ExpressOAuthServer', function() {
         .post('/?state=foobiz')
         .set('Authorization', 'Bearer foobar')
         .send({ client_id: 12345, response_type: 'code' })
-        .expect(302, function(err, res){
-            spy.called.should.be.True();
-            done(err);
+        .expect(302, function(err){
+          spy.called.should.be.true();
+          done(err);
         });
     });
 
@@ -243,8 +243,8 @@ describe('ExpressOAuthServer', function() {
         .post('/')
         .send('client_id=foo&client_secret=bar&grant_type=password&username=qux&password=biz')
         .expect({ access_token: 'foobar', token_type: 'Bearer' })
-        .expect(200, function(err, res){
-          spy.called.should.be.True();
+        .expect(200, function(err){
+          spy.called.should.be.true();
           done(err);
         });
     });
@@ -261,7 +261,6 @@ describe('ExpressOAuthServer', function() {
           return { accessToken: 'foobar', client: {}, user: {} };
         }
       };
-      var spy = sinon.spy();
       var oauth = new ExpressOAuthServer({ model: model, continueMiddleware: true });
 
       app.use(oauth.token());