diff --git a/Rakefile b/Rakefile
index c3785e7..565cc57 100644
--- a/Rakefile
+++ b/Rakefile
@@ -4,3 +4,9 @@ task :default => :spec
 
 require 'rspec/core/rake_task'
 RSpec::Core::RakeTask.new(:spec)
+
+desc 'Generate gRPC codes'
+task :grpc do
+  cd 'lib'
+  sh 'protoc --ruby_out=. --plugin=protoc-gen-grpc=`which grpc_ruby_plugin` --grpc_out=. kaede/grpc/kaede.proto'
+end