diff --git a/iputil.rkt b/private/iputil.rkt
similarity index 100%
rename from iputil.rkt
rename to private/iputil.rkt
diff --git a/msg.rkt b/private/msg.rkt
similarity index 100%
rename from msg.rkt
rename to private/msg.rkt
diff --git a/radix-tree.rkt b/private/radix-tree.rkt
similarity index 100%
rename from radix-tree.rkt
rename to private/radix-tree.rkt
diff --git a/unix-socket.rkt b/private/unix-socket.rkt
similarity index 99%
rename from unix-socket.rkt
rename to private/unix-socket.rkt
index 4f20cd2..6574111 100644
--- a/unix-socket.rkt
+++ b/private/unix-socket.rkt
@@ -11,7 +11,7 @@
          ffi/unsafe/schedule
          ffi/unsafe/port
          ffi/file
-         "private/unix-socket-ffi.rkt")
+         "unix-socket-ffi.rkt")
 (provide unix-socket-available?
          unix-socket-listener?
          unix-socket-path?
diff --git a/router b/router
index 3965608..258303f 100755
--- a/router
+++ b/router
@@ -4,11 +4,10 @@
 ; vim:ft=racket
 
 (require json
-         "iputil.rkt"
-         "unix-socket.rkt"
-         "msg.rkt"
-         "radix-tree.rkt"
-         )
+         "private/iputil.rkt"
+         "private/unix-socket.rkt"
+         "private/msg.rkt"
+         "private/radix-tree.rkt")
 
 ;; info : Peer
 ;; sock-in : Input-Port