diff --git a/dart_sdk/pubspec.yaml b/dart_sdk/pubspec.yaml
index ff94ec56e5..48511c4925 100644
--- a/dart_sdk/pubspec.yaml
+++ b/dart_sdk/pubspec.yaml
@@ -15,7 +15,7 @@ dependencies:
   flutter:
     sdk: flutter
   http: ^0.13.5
-  protobuf: ^2.0.0
+  protobuf: ">=2.0.0 <4.0.0"
   uni_links: ^0.5.1
   uni_links_platform_interface: ^1.0.0
   url_launcher: ^6.1.2