diff --git a/lib/rollbar/json.rb b/lib/rollbar/json.rb
index 003f5c08..6ea50233 100644
--- a/lib/rollbar/json.rb
+++ b/lib/rollbar/json.rb
@@ -5,8 +5,6 @@ module Rollbar
   module JSON # :nodoc:
     module_function
 
-    attr_writer :options_module
-
     def dump(object)
       Rollbar.plugins.get('basic_socket').load_scoped!(true) do
         ::JSON.generate(object)