diff --git a/src/ruby/grpc.gemspec b/src/ruby/grpc.gemspec
index 61cf18cf549..363abe9a463 100755
--- a/src/ruby/grpc.gemspec
+++ b/src/ruby/grpc.gemspec
@@ -39,6 +39,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rake-compiler', '~> 0.9'
   s.add_development_dependency 'rspec', '~> 3.2'
   s.add_development_dependency 'rubocop', '~> 0.30.0'
+  s.add_development_dependency 'signet', '~>0.6.0'
 
   s.extensions = %w(ext/grpc/extconf.rb)
 end