diff --git a/packages/firebase-core/README.md b/packages/firebase-core/README.md
index a86cf576..469cbf0d 100644
--- a/packages/firebase-core/README.md
+++ b/packages/firebase-core/README.md
@@ -5,6 +5,7 @@ ns plugin add @nativescript/firebase-core
 ```
 
 ## Usage
+Make sure you have your `google-services.json` file located in `App_Resources/src`.
 
 ### Initialize Default App