down.gemspec in down-5.2.1 vs down.gemspec in down-5.2.2

@@ -18,10 +18,15 @@
   spec.add_dependency "addressable", "~> 2.5"
 
   spec.add_development_dependency "minitest", "~> 5.8"
   spec.add_development_dependency "mocha", "~> 1.5"
   spec.add_development_dependency "rake"
-  spec.add_development_dependency "http", "~> 4.3"
+  # http 5.0 drop support of ruby 2.3 and 2.4. We still support those versions.
+  if RUBY_VERSION >= "2.5"
+    spec.add_development_dependency "http", "~> 5.0"
+  else
+    spec.add_development_dependency "http", "~> 4.3"
+  end
   spec.add_development_dependency "posix-spawn" unless RUBY_ENGINE == "jruby"
   spec.add_development_dependency "http_parser.rb"
   spec.add_development_dependency "docker-api"
   spec.add_development_dependency "warning" if RUBY_VERSION >= "2.4"
 end