diff --git a/package.json b/package.json
index 6156714..d94a9c7 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "test": "ng test",
     "lint": "ng lint",
     "e2e": "ng e2e",
-    "postinstall": "ng build -aot -prod"
+    "postinstall": "ng build --aot --prod"
   },
   "engines": {
     "node": "10.16.3",