diff --git a/in_app_purchases/step_09/app/pubspec.lock b/in_app_purchases/step_09/app/pubspec.lock
index 799d6e25d1..04d9fa1373 100644
--- a/in_app_purchases/step_09/app/pubspec.lock
+++ b/in_app_purchases/step_09/app/pubspec.lock
@@ -105,7 +105,7 @@ packages:
       name: firebase_auth
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.3.15"
+    version: "3.3.16"
   firebase_auth_platform_interface:
     dependency: transitive
     description:
diff --git a/in_app_purchases/step_09/app/pubspec.yaml b/in_app_purchases/step_09/app/pubspec.yaml
index 950cc2186f..036c352376 100644
--- a/in_app_purchases/step_09/app/pubspec.yaml
+++ b/in_app_purchases/step_09/app/pubspec.yaml
@@ -10,7 +10,7 @@ dependencies:
   cloud_firestore: ^3.1.13
   cloud_functions: ^3.2.13
   cupertino_icons: ^1.0.2
-  firebase_auth: ^3.3.15
+  firebase_auth: ^3.3.16
   firebase_core: ^1.15.0
   flutter:
     sdk: flutter