diff --git a/alfalfa_worker/jobs/openstudio/lib/alfalfa-lib-gem/lib/alfalfa_mixin.rb b/alfalfa_worker/jobs/openstudio/lib/alfalfa-lib-gem/lib/alfalfa_mixin.rb
index 91481da2..f99b7395 100644
--- a/alfalfa_worker/jobs/openstudio/lib/alfalfa-lib-gem/lib/alfalfa_mixin.rb
+++ b/alfalfa_worker/jobs/openstudio/lib/alfalfa-lib-gem/lib/alfalfa_mixin.rb
@@ -1,4 +1,5 @@
 require_relative 'utils'
+require 'json'
 module OpenStudio
   module Alfalfa
     ##