diff --git a/src/main.lisp b/src/main.lisp
index fa11f68..709e233 100644
--- a/src/main.lisp
+++ b/src/main.lisp
@@ -7,6 +7,7 @@
 (require "serapeum")
 (require "bordeaux-threads")
 (require "spinneret")
+(require "lass")
 
 (defpackage tfcserver
   (:use :cl :uiop :com.inuoe.jzon :clack :serapeum :spinneret))