diff --git a/.eslintrc b/.eslintrc
index 2ccbbab..11d01f9 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -14,6 +14,5 @@
     "node": true
   },
   "extends": "eslint:recommended",
-  "ecmaFeatures": {},
   "plugins": []
 }
diff --git a/lib/route-node.js b/lib/route-node.js
index 2fc4cae..ece1538 100644
--- a/lib/route-node.js
+++ b/lib/route-node.js
@@ -8,8 +8,7 @@ var isRegExp = utils.isRegExp
 var isString = utils.isString
 var noop = utils.noop
 
-function RouteNode (options) {
-  options = options || {}
+function RouteNode () {
   this._children = Object.create(null)
   this._funcs = Object.create(null)
   this._regExs = Object.create(null)
diff --git a/lib/router.js b/lib/router.js
index 2603bb5..e32ffb9 100644
--- a/lib/router.js
+++ b/lib/router.js
@@ -10,8 +10,7 @@ var isFunction = utils.isFunction
 var isString = utils.isString
 var noop = utils.noop
 
-function Router(options) {
-  options = options || {}
+function Router() {
   this.routes = new RouteNode()
 }
 
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..b716835
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1434 @@
+{
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+  "version": "0.2.0",
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+      "dev": true,
+      "requires": {
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+      }
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+      "dev": true,
+      "requires": {
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
+      }
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+      "dev": true
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+    "ajv": {
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+      "dev": true,
+      "requires": {
+        "ansi-styles": "^3.2.0",
+        "astral-regex": "^1.0.0",
+        "is-fullwidth-code-point": "^2.0.0"
+      }
+    },
+    "sprintf-js": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
+      "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
+      "dev": true
+    },
+    "stack-utils": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/stack-utils/-/stack-utils-1.0.2.tgz",
+      "integrity": "sha512-MTX+MeG5U994cazkjd/9KNAapsHnibjMLnfXodlkXw76JEea0UiNzrqidzo1emMwk7w5Qhc9jd4Bn9TBb1MFwA==",
+      "dev": true
+    },
+    "string-width": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
+      "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+      "dev": true,
+      "requires": {
+        "is-fullwidth-code-point": "^2.0.0",
+        "strip-ansi": "^4.0.0"
+      }
+    },
+    "strip-ansi": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+      "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+      "dev": true,
+      "requires": {
+        "ansi-regex": "^3.0.0"
+      }
+    },
+    "strip-json-comments": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
+      "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo=",
+      "dev": true
+    },
+    "supports-color": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "dev": true,
+      "requires": {
+        "has-flag": "^3.0.0"
+      }
+    },
+    "table": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/table/-/table-5.2.1.tgz",
+      "integrity": "sha512-qmhNs2GEHNqY5fd2Mo+8N1r2sw/rvTAAvBZTaTx+Y7PHLypqyrxr1MdIu0pLw6Xvl/Gi4ONu/sdceP8vvUjkyA==",
+      "dev": true,
+      "requires": {
+        "ajv": "^6.6.1",
+        "lodash": "^4.17.11",
+        "slice-ansi": "2.0.0",
+        "string-width": "^2.1.1"
+      }
+    },
+    "text-table": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
+      "integrity": "sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=",
+      "dev": true
+    },
+    "through": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
+      "dev": true
+    },
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+      "version": "0.0.33",
+      "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.33.tgz",
+      "integrity": "sha512-jRCJlojKnZ3addtTOjdIqoRuPEKBvNXcGYqzO6zWZX8KfKEpnGY5jfggJQ3EjKuu8D4bJRr0y+cYJFmYbImXGw==",
+      "dev": true,
+      "requires": {
+        "os-tmpdir": "~1.0.2"
+      }
+    },
+    "tslib": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
+      "integrity": "sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ==",
+      "dev": true
+    },
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+      "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
+      "integrity": "sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=",
+      "dev": true,
+      "requires": {
+        "prelude-ls": "~1.1.2"
+      }
+    },
+    "uri-js": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
+      "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
+      "dev": true,
+      "requires": {
+        "punycode": "^2.1.0"
+      }
+    },
+    "which": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+      "dev": true,
+      "requires": {
+        "isexe": "^2.0.0"
+      }
+    },
+    "wordwrap": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
+      "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 a972feb..c8e0df6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "routing-buddy",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "Another router library for both client and server",
   "main": "lib/router.js",
   "scripts": {
@@ -27,8 +27,8 @@
   },
   "homepage": "https://github.com/xbudex/routing-buddy#readme",
   "devDependencies": {
-    "eslint": "^1.10.3",
-    "expect": "^1.14.0",
-    "mocha": "^2.4.5"
+    "eslint": "^5.12.0",
+    "expect": "^23.6.0",
+    "mocha": "^5.2.0"
   }
 }
diff --git a/test/route-node.js b/test/route-node.js
index 7e0d308..2a63702 100644
--- a/test/route-node.js
+++ b/test/route-node.js
@@ -3,7 +3,7 @@ var RouteNode = require('../lib/route-node')
 
 module.exports = describe('RouteNode', function () {
   it('→ exists', function () {
-    expect(new RouteNode()).toExist()
+    expect(new RouteNode()).toBeInstanceOf(RouteNode)
   })
 
   describe('→ add nodes', function () {
@@ -38,11 +38,11 @@ module.exports = describe('RouteNode', function () {
 
     it('→ get error callback for not found', function (done) {
       node.get(['fake', 'route'], [], function (err, func, cbContext, args) {
-        expect(err).toBeA(Error)
+        expect(err).toBeInstanceOf(Error)
         expect(err.message).toMatch(/not found/)
-        expect(func).toNotExist()
-        expect(cbContext).toNotExist()
-        expect(args).toNotExist()
+        expect(func).not.toBeDefined()
+        expect(cbContext).not.toBeDefined()
+        expect(args).not.toBeDefined()
         done()
       })
     })
diff --git a/test/router.js b/test/router.js
index e5f54fe..190f3bb 100644
--- a/test/router.js
+++ b/test/router.js
@@ -4,7 +4,7 @@ var NotFoundError = require('../lib/error').NotFound
 
 describe('Router', function () {
   it('→ exists', function () {
-    expect(Router).toExist()
+    expect(Router).toBeDefined()
   })
 
   it('→ add root node', function (done) {
@@ -31,7 +31,7 @@ describe('Router', function () {
     var router = new Router()
     router.add(['/user', /^(\d+)$/], function (number) { return number })
     router.route('/user/', function (err) {
-      expect(err).toBeA(NotFoundError)
+      expect(err).toBeInstanceOf(NotFoundError)
       done()
     })
   })
@@ -39,9 +39,9 @@ describe('Router', function () {
   it('→ get error in callback for missing handler', function (done) {
     var router = new Router()
     router.route('/some/fake/path', function (err, handlerResult) {
-      expect(err).toBeA(Error)
+      expect(err).toBeInstanceOf(Error)
       expect(err.message).toMatch(/not found/)
-      expect(handlerResult).toNotExist()
+      expect(handlerResult).not.toBeDefined()
       done()
     })
   })
@@ -62,7 +62,7 @@ describe('Router', function () {
     var router = new Router()
     router.add(['/by/id', /\d+/], function () {})
     router.route('/by/id/not-an-id', function (err) {
-      expect(err).toBeA(NotFoundError)
+      expect(err).toBeInstanceOf(NotFoundError)
       done()
     })
   })
@@ -85,8 +85,8 @@ describe('Router', function () {
     var router = new Router()
     router.add(['by', 'order', /(\d+)/], function (one, two, three) {
       expect(one).toBe('1')
-      expect(two).toNotExist()
-      expect(three).toNotExist()
+      expect(two).not.toBeDefined()
+      expect(three).not.toBeDefined()
     })
 
     router.route('/by/order/1-2-3', function (err) {
@@ -131,7 +131,7 @@ describe('Router', function () {
     var router = new Router()
     router.add(['/by/order', toInt], function () {})
     router.route('/by/order/not-found', function (err) {
-      expect(err).toBeA(NotFoundError)
+      expect(err).toBeInstanceOf(NotFoundError)
       done()
     })
   })
diff --git a/test/utils.js b/test/utils.js
index 44f2e74..b28344c 100644
--- a/test/utils.js
+++ b/test/utils.js
@@ -16,12 +16,12 @@ SomeClass.prototype.bar = 'asdf'
 
 describe('utils', function () {
   it('→ exists', function () {
-    expect(utils).toExist()
+    expect(utils).toBeDefined()
   })
 
   describe('→ noop', function () {
     it('→ is a function', function () {
-      expect(noop).toBeA(Function)
+      expect(noop).toBeInstanceOf(Function)
     })
   })