diff --git a/.gitignore b/.gitignore
index 2a97c41..7ecf62a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@ cypress/screenshots
 test/app/.sapper
 test/app/app/manifest
 test/app/export
+test/app/build
 runtime.js
 runtime.js.map
 cli.js
diff --git a/package.json b/package.json
index 111098f..3fc3003 100644
--- a/package.json
+++ b/package.json
@@ -30,6 +30,7 @@
     "mkdirp": "^0.5.1",
     "mri": "^1.1.0",
     "node-fetch": "^1.7.3",
+    "port-authority": "^1.0.0",
     "pretty-ms": "^3.1.0",
     "relative": "^3.0.2",
     "require-relative": "^0.8.7",