diff --git a/googlemaps-services.gemspec b/googlemaps-services.gemspec
index 6b50ceb..473a407 100644
--- a/googlemaps-services.gemspec
+++ b/googlemaps-services.gemspec
@@ -18,8 +18,8 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_runtime_dependency 'nokogiri', '~> 1.7', '>= 1.7.1'
-  spec.add_runtime_dependency 'http', '~> 3.0', '>= 3.0.0'
-  spec.add_development_dependency 'bundler', '~> 1.14'
+  spec.add_runtime_dependency 'http', '~> 4.3'
+  spec.add_development_dependency 'bundler', '~> 2.2'
   spec.add_development_dependency 'rake', '~> 12.0'
   spec.add_development_dependency 'rspec', '~> 3.5'
 end