--- a/Gemfile
+++ b/Gemfile
@@ -402,7 +402,7 @@
 gem 'grpc', '~> 1.10.0'
 
 # Locked until https://github.com/google/protobuf/issues/4210 is closed
-gem 'google-protobuf', '= 3.5.1'
+gem 'google-protobuf', '~> 3.2'
 
 gem 'toml-rb', '~> 1.0', require: false