diff --git a/packages/altfire_messenger/example/pubspec.lock b/packages/altfire_messenger/example/pubspec.lock
index 584b5dd..239afe1 100644
--- a/packages/altfire_messenger/example/pubspec.lock
+++ b/packages/altfire_messenger/example/pubspec.lock
@@ -76,10 +76,10 @@ packages:
     dependency: "direct main"
     description:
       name: firebase_core
-      sha256: "4aef2a23d0f3265545807d68fbc2f76a6b994ca3c778d88453b99325abd63284"
+      sha256: "372d94ced114b9c40cb85e18c50ac94a7e998c8eec630c50d7aec047847d27bf"
       url: "https://pub.dev"
     source: hosted
-    version: "2.30.1"
+    version: "2.31.0"
   firebase_core_platform_interface:
     dependency: transitive
     description:
@@ -92,10 +92,10 @@ packages:
     dependency: transitive
     description:
       name: firebase_core_web
-      sha256: "67f2fcc600fc78c2f731c370a3a5e6c87ee862e3a2fba6f951eca6d5dafe5c29"
+      sha256: "43d9e951ac52b87ae9cc38ecdcca1e8fa7b52a1dd26a96085ba41ce5108db8e9"
       url: "https://pub.dev"
     source: hosted
-    version: "2.16.0"
+    version: "2.17.0"
   firebase_in_app_messaging:
     dependency: transitive
     description:
diff --git a/packages/altfire_messenger/example/pubspec.yaml b/packages/altfire_messenger/example/pubspec.yaml
index 5be3fa1..7102ff6 100644
--- a/packages/altfire_messenger/example/pubspec.yaml
+++ b/packages/altfire_messenger/example/pubspec.yaml
@@ -9,7 +9,7 @@ environment:
 dependencies:
   altfire_messenger:
     path: ../
-  firebase_core: ^2.30.1
+  firebase_core: ^2.31.0
   flutter:
     sdk: flutter