diff --git a/packages/stream_chat_flutter_core/pubspec.yaml b/packages/stream_chat_flutter_core/pubspec.yaml
index e192c655..eaca7bd2 100644
--- a/packages/stream_chat_flutter_core/pubspec.yaml
+++ b/packages/stream_chat_flutter_core/pubspec.yaml
@@ -25,5 +25,5 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
   freezed: ^2.4.0
-  mocktail: ^0.3.0
+  mocktail: ">=0.3.0 <2.0.0"