diff --git a/package.json b/package.json
index e405f80..d23eb41 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,6 @@
     "pty.js": "0.3.0"
   },
   "dependencies": {
-    "selenium-standalone": "4.8.0",
     "gulp-gh-pages": "0.5.4",
     "browser-sync": "2.11.1",
     "autoprefixer": "6.3.1",
@@ -40,14 +39,17 @@
     "commander": "2.9.0",
     "uglify-js": "2.6.1",
     "ansi_up": "1.3.0",
-    "intern": "3.0.6",
-    "dotenv": "2.0.0",
     "async": "1.5.2",
     "gulp": "3.9.0",
     "elm": "0.16.0",
     "koa": "1.1.2",
     "ncp": "2.0.0"
   },
+  "devDependencies": {
+    "selenium-standalone": "4.8.0",
+    "intern": "3.0.6",
+    "dotenv": "2.0.0"
+  },
   "preferGlobal": true,
   "bin": {
     "elm-ui": "bin/index.js"