diff --git a/config/boot.rb b/config/boot.rb
index c8ea7371..af2d39bc 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -8,6 +8,7 @@
 
 # General DLSS infrastructure.
 require 'dor-services'
+require 'dor-workflow-service'
 
 # Environment.
 unless defined?(NO_ENVIRONMENT)