diff --git a/lib/rtasklib.rb b/lib/rtasklib.rb
index 617dd1a..b4c6249 100644
--- a/lib/rtasklib.rb
+++ b/lib/rtasklib.rb
@@ -5,9 +5,6 @@
 require_relative "rtasklib/serializer"
 require_relative "rtasklib/taskrc"
 
-# deprecated
-require_relative "rtasklib/marshallable"
-
 module Rtasklib
 
   class TaskWarrior