diff --git a/msg.rkt b/msg.rkt
index 0f12a53..a01a8f2 100644
--- a/msg.rkt
+++ b/msg.rkt
@@ -101,6 +101,21 @@
         'msg (match msg
                [(msg:data _ _ data) data]
                [(msg:no-route _ _) (hash)]
+
+               [(msg:update _ _
+                            (route _
+                                   net
+                                   pref
+                                   self-orig?
+                                   as
+                                   org))
+                (hash 'network (ip->string (subnet-ip net))
+                      'netmask (ip->string (netmask-ip (subnet-mask net)))
+                      'localpref pref
+                      'selfOrigin self-orig?
+                      'ASPath as
+                      'origin (symbol->string org))]
+
                [_ (error 'msg->jsexpr
                          (format "unimplemented ~a" (msg-type msg)))])))
 
@@ -109,12 +124,12 @@
   (jsexpr->bytes (msg->jsexpr msg)))
 
 (module+ test
-  #;
   (check-equal? (msg->jsexpr
                  (msg:update
                   (string->ip "1.2.3.4")
                   (string->ip "1.2.3.7")
-                  (route (subnet (string->ip "1.2.3.5") 7)
+                  (route (string->ip "1.2.3.4")
+                         (subnet (string->ip "1.2.3.5") 25)
                          100
                          #t
                          '(1 2)
@@ -143,7 +158,7 @@
                  (string->ip "1.2.3.4")
                  (string->ip "1.2.3.7")
                  (route (string->ip "1.2.3.4")
-                        (subnet (string->ip "1.2.3.5") 7)
+                        (subnet (string->ip "1.2.3.5") 25)
                         100
                         #t
                         '(1 2)