diff --git a/daemon.asd b/daemon.asd
index 630dbce..9ae6376 100644
--- a/daemon.asd
+++ b/daemon.asd
@@ -1,10 +1,9 @@
-(asdf:load-system :trivial-features :verbose nil)
-
-(asdf:defsystem :daemon
+(defsystem :daemon
   :version "0.0.4"
   :author "Masatoshi SANO"
   :description "Process daemonization for some common lisp."
   :licence "MIT"
+  :depends-on (#:trivial-features)       
   :components ((:file "package")
                #-windows(:file "daemon"))
   :serial t