diff --git a/app/package.json b/app/package.json
index f8aec81..d59fbd2 100644
--- a/app/package.json
+++ b/app/package.json
@@ -8,7 +8,7 @@
     "ionic:build": "ionic-app-scripts build",
     "ionic:serve": "ionic-app-scripts serve",
     "e2e": "ionic-app-scripts build && protractor",
-    "postinstall": "webdriver-manager update",
+    "postinstall": "webdriver-manager update --gecko false",
     "start": "ionic serve",
     "test": "ng test --code-coverage",
     "cov": "opn coverage/index.html",