diff --git a/doc/nrepl/bb.edn b/doc/nrepl/bb.edn
index 8efe856..ddc1105 100644
--- a/doc/nrepl/bb.edn
+++ b/doc/nrepl/bb.edn
@@ -5,8 +5,7 @@
  :tasks {http-server {:doc "Starts http server for serving static files"
                       :requires ([babashka.http-server :as http])
                       :task (do (http/serve {:port 1341 :dir "."})
-                                (println "Serving static assets at http://localhost:1341")
-                                (deref (promise)))}
+                                (println "Serving static assets at http://localhost:1341"))}
 
          browser-nrepl {:doc "Start browser nREPL"
                         :requires ([sci.nrepl.browser-server :as bp])
diff --git a/src/scittle/nrepl.cljs b/src/scittle/nrepl.cljs
index 801a373..fffa295 100644
--- a/src/scittle/nrepl.cljs
+++ b/src/scittle/nrepl.cljs
@@ -34,7 +34,7 @@
 (defn ws-url [host port path]
   (str "ws://" host ":" port "/" path))
 
-(let [ws-port (or (.-SCITTLE_NREPL_WEBSOCKET_PORT js/window) 1340)]
+(when-let [ws-port (.-SCITTLE_NREPL_WEBSOCKET_PORT js/window)]
   (set! (.-ws_nrepl js/window)
         (new js/WebSocket (ws-url "localhost" ws-port "_nrepl"))))