diff --git a/bower.json b/bower.json
index 5ab8e60..f9946a4 100644
--- a/bower.json
+++ b/bower.json
@@ -19,7 +19,7 @@
   ],
   "dependencies": {
     "polymer": "Polymer/polymer#1.9 - 2",
-    "firebase": "^4.1.1",
+    "firebase": "^4.5.0",
     "app-storage": "PolymerElements/app-storage#1 - 2"
   },
   "devDependencies": {
@@ -33,7 +33,7 @@
     "1.x": {
       "dependencies": {
         "polymer": "Polymer/polymer#^1.9",
-        "firebase": "^4.1.1",
+        "firebase": "^4.5.0",
         "app-storage": "PolymerElements/app-storage#^0.9.0"
       },
       "devDependencies": {
diff --git a/firebase-app.html b/firebase-app.html
index 6ec937f..f4ba9d2 100644
--- a/firebase-app.html
+++ b/firebase-app.html
@@ -14,6 +14,7 @@
 <link rel="import" href="firebase-auth-script.html">
 <link rel="import" href="firebase-storage-script.html">
 <link rel="import" href="firebase-messaging-script.html">
+<link rel="import" href="firebase-firestore-script.html">
 <dom-module id="firebase-app">
   <script>
     (function() {
@@ -95,6 +96,17 @@
             value: null
           },
 
+          /**
+           * The Google Cloud Project ID for your project. You can find this
+           * in the Firebase Console under "Web Setup".
+           *
+           * For example: `polymerfire-test`
+           */
+          projectId: {
+            type: String,
+            value: null
+          },
+
           /**
            * The Firebase app object constructed from the other fields of
            * this element.
@@ -103,16 +115,17 @@
           app: {
             type: Object,
             notify: true,
-            computed: '__computeApp(name, apiKey, authDomain, databaseUrl, storageBucket, messagingSenderId)'
+            computed: '__computeApp(name, apiKey, authDomain, databaseUrl, storageBucket, messagingSenderId, projectId)'
           }
         },
 
-        __computeApp: function(name, apiKey, authDomain, databaseUrl, storageBucket, messagingSenderId) {
+        __computeApp: function(name, apiKey, authDomain, databaseUrl, storageBucket, messagingSenderId, projectId) {
           if (apiKey && authDomain && databaseUrl) {
             var init = [{
               apiKey: apiKey,
               authDomain: authDomain,
               databaseURL: databaseUrl,
+              projectId: projectId,
               storageBucket: storageBucket,
               messagingSenderId: messagingSenderId
             }];
diff --git a/firebase-firestore-script.html b/firebase-firestore-script.html
new file mode 100644
index 0000000..db57bd6
--- /dev/null
+++ b/firebase-firestore-script.html
@@ -0,0 +1 @@
+<script src="../firebase/firebase-firestore.js"></script>
\ No newline at end of file