diff --git a/.travis.yml b/.travis.yml
index 7ab9c76a..a28f5d42 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,8 @@
 language: node_js
 node_js:
+  - 12
   - 10
   - 8
-  - 6
 before_install:
   - npm install --global npm@latest
 after_success:
diff --git a/lib/completion/completer.js b/lib/completion/completer.js
index 17926d13..b80ee0d6 100644
--- a/lib/completion/completer.js
+++ b/lib/completion/completer.js
@@ -94,7 +94,7 @@ class Completer {
       const flag = help.flags[key];
 
       if (flag.alias) {
-        alias.push(Object.assign({}, flag, {name: flag.alias}));
+        alias.push({...flag, name: flag.alias});
       }
 
       flag.name = key;
diff --git a/lib/routes/help.js b/lib/routes/help.js
index 50436d41..860d9343 100644
--- a/lib/routes/help.js
+++ b/lib/routes/help.js
@@ -1,6 +1,6 @@
 'use strict';
 const inquirer = require('inquirer');
-const opn = require('opn');
+const open = require('open');
 
 module.exports = app => {
   app.insight.track('yoyo', 'help');
@@ -31,6 +31,6 @@ module.exports = app => {
       return;
     }
 
-    opn(answer.whereTo);
+    open(answer.whereTo);
   });
 };
diff --git a/package-lock.json b/package-lock.json
index eebfabb9..4fb8643a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7370,6 +7370,14 @@
         "mimic-fn": "^1.0.0"
       }
     },
+    "open": {
+      "version": "6.3.0",
+      "resolved": "https://registry.npmjs.org/open/-/open-6.3.0.tgz",
+      "integrity": "sha512-6AHdrJxPvAXIowO/aIaeHZ8CeMdDf7qCyRNq8NwJpinmCdXhz+NZR7ie1Too94lpciCDsG+qHGO9Mt0svA4OqA==",
+      "requires": {
+        "is-wsl": "^1.1.0"
+      }
+    },
     "open-editor": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/open-editor/-/open-editor-1.2.0.tgz",
@@ -7385,6 +7393,7 @@
       "version": "5.3.0",
       "resolved": "https://registry.npmjs.org/opn/-/opn-5.3.0.tgz",
       "integrity": "sha1-ZIcVZchjh18FLP31PT48ta21Oxw=",
+      "dev": true,
       "requires": {
         "is-wsl": "^1.1.0"
       }
diff --git a/package.json b/package.json
index 8f4db1dc..a9bfcf4d 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "yo-complete": "lib/completion/index.js"
   },
   "engines": {
-    "node": ">=6"
+    "node": ">=8"
   },
   "scripts": {
     "postinstall": "yodoctor",
@@ -57,7 +57,7 @@
     "lodash": "^4.17.10",
     "meow": "^3.0.0",
     "npm-keyword": "^5.0.0",
-    "opn": "^5.3.0",
+    "open": "^6.3.0",
     "package-json": "^5.0.0",
     "parse-help": "^1.0.0",
     "read-pkg-up": "^4.0.0",
@@ -108,6 +108,9 @@
           "mocha"
         ]
       }
-    ]
+    ],
+    "rules": {
+      "promise/prefer-await-to-then": 0
+    }
   }
 }
diff --git a/test/route-help.js b/test/route-help.js
index 7ff88197..9efb8eb2 100644
--- a/test/route-help.js
+++ b/test/route-help.js
@@ -12,9 +12,9 @@ describe('help route', () => {
     this.homeRoute = sinon.spy();
     this.router = new Router(sinon.stub(), this.insight);
     this.router.registerRoute('home', this.homeRoute);
-    this.opn = sinon.stub();
+    this.open = sinon.stub();
     const helpRoute = proxyquire('../lib/routes/help', {
-      opn: this.opn
+      open: this.open
     });
     this.router.registerRoute('help', helpRoute);
   });
@@ -42,8 +42,8 @@ describe('help route', () => {
     const url = 'http://yeoman.io';
     this.sandbox.stub(inquirer, 'prompt').returns(Promise.resolve({whereTo: url}));
     return this.router.navigate('help').then(() => {
-      sinon.assert.calledWith(this.opn, url);
-      sinon.assert.calledOnce(this.opn);
+      sinon.assert.calledWith(this.open, url);
+      sinon.assert.calledOnce(this.open);
     });
   });
 });