appsignal.gemspec in appsignal-2.2.1 vs appsignal.gemspec in appsignal-2.3.0.beta.1

@@ -22,13 +22,12 @@
   gem.required_ruby_version = ">= 1.9"
 
   gem.extensions = %w(ext/extconf.rb)
 
   gem.add_dependency "rack"
-  gem.add_dependency "thread_safe"
 
   gem.add_development_dependency "rake", "~> 11"
-  gem.add_development_dependency "rspec", "~> 3.5"
+  gem.add_development_dependency "rspec", "~> 3.6"
   gem.add_development_dependency "pry"
   gem.add_development_dependency "timecop"
   gem.add_development_dependency "webmock"
   gem.add_development_dependency "rubocop", "0.46.0"
   gem.add_development_dependency "yard"