diff --git a/README.md b/README.md
index 53baf11..5b06add 100644
--- a/README.md
+++ b/README.md
@@ -56,9 +56,13 @@
 
     $ make build
 
+### build a single file
+
+    $ make build file=index.html
+
 ### start dev server
 
-    $ make
+    $ make serve
 
 Visit `localhost:8080` in web browser