lib/http/client.rb in http-5.1.1 vs lib/http/client.rb in http-5.2.0

@@ -182,10 +182,10 @@
         form = make_form_data(opts.form)
         headers[Headers::CONTENT_TYPE] ||= form.content_type
         form
       when opts.json
         body = MimeType[:json].encode opts.json
-        headers[Headers::CONTENT_TYPE] ||= "application/json; charset=#{body.encoding.name}"
+        headers[Headers::CONTENT_TYPE] ||= "application/json; charset=#{body.encoding.name.downcase}"
         body
       end
     end
 
     def make_form_data(form)