diff --git a/pubspec.yaml b/pubspec.yaml
index 15d46505..6511565b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -11,7 +11,7 @@ dependencies:
   http: '>=0.12.0 <0.14.0'
   logging: ^1.0.0
   meta: '>=1.6.0 <2.0.0'
-  protobuf: '>=1.1.0 <3.0.0'
+  protobuf: ">=1.1.0 <4.0.0"
   quiver: '>=2.1.5 <4.0.0'
 
 dev_dependencies: