diff --git a/Makefile b/Makefile
index 5e48058..a8807f8 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,7 @@
 LINT_STYLE ?= mdl_relaxed.rb
 
 serve: setup
-	gitbook serve --port 4040
+	npm start
 
 build: setup
 	gitbook build