diff --git a/pubspec.yaml b/pubspec.yaml
index 904dc81..b7e5676 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -32,7 +32,7 @@ dev_dependencies:
   dart_flutter_team_lints: ^3.0.0
   json_serializable: ^6.9.0
   # Needed because we are configuring `combining_builder`
-  source_gen: ^1.0.0
+  source_gen: '>=1.0.0 <3.0.0'
   test: ^1.6.0
   test_descriptor: ^2.0.0
   test_process: ^2.0.0