diff --git a/packages/flutter_chat_firebase/pubspec.yaml b/packages/flutter_chat_firebase/pubspec.yaml
index b0d7432..fa65550 100644
--- a/packages/flutter_chat_firebase/pubspec.yaml
+++ b/packages/flutter_chat_firebase/pubspec.yaml
@@ -15,10 +15,10 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  firebase_core: ^2.1.1
-  cloud_firestore: ^4.0.5
-  firebase_storage: ^11.0.5
-  firebase_auth: ^4.1.2
+  firebase_core: ">=2.1.1 <4.0.0"
+  cloud_firestore: ">=4.0.5 <6.0.0"
+  firebase_storage: ">=11.0.5 <13.0.0"
+  firebase_auth: ">=4.1.2 <6.0.0"
   uuid: ^4.0.0
   flutter_chat_interface:
     hosted: https://forgejo.internal.iconica.nl/api/packages/internal/pub