diff --git a/etcdv3.gemspec b/etcdv3.gemspec
index 1ccc79c..07ee79e 100644
--- a/etcdv3.gemspec
+++ b/etcdv3.gemspec
@@ -14,6 +14,6 @@ Gem::Specification.new do |s|
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
 
-  s.add_dependency("grpc", "1.6.0")
+  s.add_dependency("grpc", "~> 1.6")
   s.add_development_dependency("rspec")
 end