diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 730a7d7e3..f874d4e6c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -22,7 +22,7 @@
    ```.firebaserc
     {
         "projects": {
-            "default": "your-firebase-project-id",
+            "default": "your-firebase-project-id"
         }
     }
    ```