diff --git a/package.json b/package.json
index b1e2aed710..3bcd29ede4 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "lint": "eslint '**/*.js'",
     "precommit": "lint-staged",
     "prettier": "prettier --write '**/*.{js,json,css}'",
-    "start": "cd ./shells/dev && open ./index.html && webpack --config webpack.config.js --watch",
+    "start": "cd ./shells/dev && opener ./index.html && webpack --config webpack.config.js --watch",
     "test": "jest",
     "test:chrome": "node ./shells/browser/chrome/test",
     "test:firefox": "node ./shells/browser/firefox/test",
@@ -86,6 +86,7 @@
     "node-libs-browser": "0.5.3",
     "nullthrows": "^1.0.0",
     "object-assign": "4.0.1",
+    "opener": "^1.5.1",
     "prettier": "^1.16.1",
     "prop-types": "^15.6.2",
     "react": "^16.8.0-alpha.1",
diff --git a/yarn.lock b/yarn.lock
index d475cc5424..83add64625 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7705,6 +7705,11 @@ open@0.0.5:
   version "0.0.5"
   resolved "https://registry.yarnpkg.com/open/-/open-0.0.5.tgz#42c3e18ec95466b6bf0dc42f3a2945c3f0cad8fc"
 
+opener@^1.5.1:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/opener/-/opener-1.5.1.tgz#6d2f0e77f1a0af0032aca716c2c1fbb8e7e8abed"
+  integrity sha512-goYSy5c2UXE4Ra1xixabeVh1guIX/ZV/YokJksb6q2lubWu6UbvPQ20p542/sFIll1nl8JnCyK9oBaOcCWXwvA==
+
 optimist@^0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/optimist/-/optimist-0.6.1.tgz#da3ea74686fa21a19a111c326e90eb15a0196686"