diff --git a/README.md b/README.md
index f04c205..c89b049 100644
--- a/README.md
+++ b/README.md
@@ -36,14 +36,13 @@ Journi is a web application for journaling and visualizing travel experiences. U
 
 ## Backend — Firebase
 
-![Database diagram](/DB-diagram.PNG)
+![Firestore diagram](public/DB-diagram.PNG)
 
-| Service | Purpose |
-|---------|---------|
-| **Authentication** | Google account sign-in via `GoogleAuthProvider` |
-| **Firestore** | Stores user profiles (`users/{uid}`) and journal entries (`users/{uid}/entries/{id}`) |
-| **Storage** | Stores uploaded trip photos, accessed per user |
-| **Security rules** | Simple per-user access — only authenticated users can read/write their own data |
+Journi uses Firebase as its backend. Users sign in with Google through Firebase Authentication, and their data is linked to their user ID.
+
+Firestore stores user profiles in `users/{uid}` and journal entries in `users/{uid}/entries/{id}`. Firebase Storage stores uploaded trip photos.
+
+Firebase Security Rules protect the data, so authenticated users can only read and write their own profiles, entries, and photos.
 
 ---