diff --git a/lib/x/errors/http_error.rb b/lib/x/errors/http_error.rb
index 2aceedc..9f54aeb 100644
--- a/lib/x/errors/http_error.rb
+++ b/lib/x/errors/http_error.rb
@@ -35,7 +35,7 @@ def message_from_json_response(response)
     end
 
     def json?(response)
-      JSON_CONTENT_TYPE_REGEXP.match?(response["content-type"])
+      JSON_CONTENT_TYPE_REGEXP === response["content-type"]
     end
   end
 end
diff --git a/lib/x/response_parser.rb b/lib/x/response_parser.rb
index d24a4a1..0b4d6ec 100644
--- a/lib/x/response_parser.rb
+++ b/lib/x/response_parser.rb
@@ -55,7 +55,7 @@ def error_class(response)
     end
 
     def json?(response)
-      JSON_CONTENT_TYPE_REGEXP.match?(response["content-type"])
+      JSON_CONTENT_TYPE_REGEXP === response["content-type"]
     end
   end
 end