diff --git a/bin/pangolin-core.js b/bin/pangolin-core.js
index ba83000d..ab9ad1dc 100755
--- a/bin/pangolin-core.js
+++ b/bin/pangolin-core.js
@@ -12,8 +12,11 @@ program
 program
   .command('dev')
   .description('Start development server')
-  .action(() => {
-    require('../lib/commands/dev')()
+  .option('-o, --open [browser]', 'Open in default or specific browser')
+  .action(env => {
+    require('../lib/commands/dev')({
+      open: env.open
+    })
   })
 
 program
diff --git a/lib/commands/dev.js b/lib/commands/dev.js
index a48c01d3..96234556 100644
--- a/lib/commands/dev.js
+++ b/lib/commands/dev.js
@@ -3,7 +3,7 @@ const generateConfig = require('../config/generate')
 const generateImports = require('../utils/generate-imports')
 const getPort = require('../utils/get-port')
 const normalizePath = require('../utils/normalize-path')
-const opn = require('opn')
+const open = require('open')
 const path = require('path')
 const store = require('../store')
 const WebSocket = require('ws')
@@ -12,8 +12,10 @@ const WebpackDevServer = require('webpack-dev-server')
 
 /**
  * Start development server
+ * @param {Object} options Options
+ * @param {Boolean|String} options.open Open in browser
  */
-module.exports = async function () {
+module.exports = async function (options) {
   process.env.NODE_ENV = 'development'
   process.env.PANGOLIN_ENV = 'dev'
 
@@ -52,9 +54,9 @@ module.exports = async function () {
   const server = new WebpackDevServer(compiler, devServerOptions)
 
   server.listen(serverPort, serverHost, () => {
-    // Open web browser if config option is set
-    if (store.state.config.devServer.open) {
-      opn(serverURL, { app: store.state.config.devServer.browser })
+    // Open web browser if flag is set
+    if (options.open) {
+      open(serverURL, { app: typeof options.open === 'string' && options.open })
     }
   })
 
diff --git a/package-lock.json b/package-lock.json
index 5a4bd156..5a53d3f8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9880,6 +9880,14 @@
         "mimic-fn": "^1.0.0"
       }
     },
+    "open": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/open/-/open-6.0.0.tgz",
+      "integrity": "sha512-/yb5mVZBz7mHLySMiSj2DcLtMBbFPJk5JBKEkHVZFxZAPzeg3L026O0T+lbdz1B2nyDnkClRSwRQJdeVUIF7zw==",
+      "requires": {
+        "is-wsl": "^1.1.0"
+      }
+    },
     "opener": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/opener/-/opener-1.5.1.tgz",
@@ -10977,15 +10985,15 @@
       "integrity": "sha512-28iF6xPQrP8Oa6uxE6a1biz+lWeTOAPKggvjB8HAs6nVMKZwf5bG++632Dx614hIWgUPkgivRfG+a8uAXGTIbA=="
     },
     "prism-themes": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/prism-themes/-/prism-themes-1.0.1.tgz",
-      "integrity": "sha512-tRYOqg2tT5/eB++iX+rqRnqESkCKuoV+0PrUiGKdWMr5lApd/hwfu+72Hi0OS50wmcuIty3GB1HrRqoBD+Cpfg==",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/prism-themes/-/prism-themes-1.1.0.tgz",
+      "integrity": "sha512-xBkflbKbstGGasW3P68KQzAuObLQeH//I5mn37jKVHVDrRLp4Xct/n8F/tV5h+CKIMa3nDAZ2q0bt8ItSiS72A==",
       "dev": true
     },
     "prismjs": {
-      "version": "1.15.0",
-      "resolved": "https://registry.npmjs.org/prismjs/-/prismjs-1.15.0.tgz",
-      "integrity": "sha512-Lf2JrFYx8FanHrjoV5oL8YHCclLQgbJcVZR+gikGGMqz6ub5QVWDTM6YIwm3BuPxM/LOV+rKns3LssXNLIf+DA==",
+      "version": "1.16.0",
+      "resolved": "https://registry.npmjs.org/prismjs/-/prismjs-1.16.0.tgz",
+      "integrity": "sha512-OA4MKxjFZHSvZcisLGe14THYsug/nF6O1f0pAJc0KN0wTyAcLqmsbE+lTGKSpyh+9pEW57+k6pg2AfYR+coyHA==",
       "requires": {
         "clipboard": "^2.0.0"
       }
@@ -13703,9 +13711,9 @@
       }
     },
     "webpack-chain": {
-      "version": "5.2.3",
-      "resolved": "https://registry.npmjs.org/webpack-chain/-/webpack-chain-5.2.3.tgz",
-      "integrity": "sha512-4s4X02RiiPKz3v9LwSCTNUyieY8EOfj0DflUC2ySUvtj2/IWH+ai9Orz07uYiQ4l/knR5U88Q9Nty3Oay6OGGw==",
+      "version": "5.2.4",
+      "resolved": "https://registry.npmjs.org/webpack-chain/-/webpack-chain-5.2.4.tgz",
+      "integrity": "sha512-3g0uIbzM/EWnmf52bYhB5IZeBZiw5g9vNqF4iTBEqabpxGxcv+Aj9oL4Cvr19ujOsv/HPvpRFRPLZ/aylv10Wg==",
       "requires": {
         "deepmerge": "^1.5.2",
         "javascript-stringify": "^2.0.0"
diff --git a/package.json b/package.json
index 5f777ab9..12769a33 100644
--- a/package.json
+++ b/package.json
@@ -63,9 +63,9 @@
     "mini-css-extract-plugin": "^0.5.0",
     "node-sass": "^4.9.3",
     "nunjucks": "^3.2.0",
-    "opn": "^5.5.0",
+    "open": "^6.0.0",
     "postcss-loader": "^3.0.0",
-    "prismjs": "^1.15.0",
+    "prismjs": "^1.16.0",
     "sass-loader": "^7.0.1",
     "style-loader": "^0.23.0",
     "stylelint": "^9.10.1",
@@ -73,7 +73,7 @@
     "stylelint-webpack-plugin": "^0.10.1",
     "webpack": "^4.29.6",
     "webpack-bundle-analyzer": "^3.1.0",
-    "webpack-chain": "^5.2.3",
+    "webpack-chain": "^5.2.4",
     "webpack-dev-server": "^3.2.1",
     "webpack-merge": "^4.2.1",
     "webpackbar": "^3.0.3",
@@ -92,7 +92,7 @@
     "focus-trap": "^5.0.0",
     "nyc": "^13.3.0",
     "postcss-custom-properties": "^8.0.6",
-    "prism-themes": "^1.0.1",
+    "prism-themes": "^1.1.0",
     "sanitize.css": "^8.0.0",
     "standard-version": "^5.0.2"
   },
diff --git a/test/project/pangolin.config.js b/test/project/pangolin.config.js
index bbf0a696..e666b269 100644
--- a/test/project/pangolin.config.js
+++ b/test/project/pangolin.config.js
@@ -24,8 +24,6 @@
  */
 // module.exports = {
 //   devServer: {
-//     open: true,
-//     browser: 'firefox',
 //     port: 1337
 //   }
 // }