diff --git a/Gemfile b/Gemfile
index 7ed788d..53050ef 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ source 'https://rubygems.org'
 gemspec
 
 group :development, :test do
-  gem 'bundler', '~> 1.6'
+  gem 'bundler', '~> 2.0'
   gem 'rake', '~> 0.9.6'
   gem 'rspec', '~> 3.4.0'
   gem 'rspec-nc', '~> 0'
diff --git a/simple_spark.gemspec b/simple_spark.gemspec
index c009eab..e4f59fd 100644
--- a/simple_spark.gemspec
+++ b/simple_spark.gemspec
@@ -20,5 +20,5 @@ Gem::Specification.new do |spec|
 
 
   spec.add_dependency 'json', '>= 1.7.7', '< 3.0'
-  spec.add_dependency 'excon', '>= 0.16.0', '< 1.0'
+  spec.add_dependency 'excon', '~> 1.5'
 end