diff --git a/package.json b/package.json
index 81e3831..01ce31b 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "build": "react-scripts build",
     "test": "react-scripts test",
     "eject": "react-scripts eject",
-    "predeploy": "yarn build",
+    "predeploy": "react-scripts build && rm build/*/*/*.map",
     "deploy": "gh-pages -d build"
   },
   "eslintConfig": {