diff --git a/package.json b/package.json
index 7ce1ed8..3265975 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "predeploy": "npm run build",
     "deploy": "gh-pages -d build",
     "start": "react-scripts start",
-    "build": "react-scripts build",
+    "build": "react-scripts build && cp build/index.html build/404.html",
     "test": "react-scripts test",
     "eject": "react-scripts eject"
   },