diff --git a/docs/site/index.html b/docs/site/index.html
index 3ead6081..4e0cb6eb 100644
--- a/docs/site/index.html
+++ b/docs/site/index.html
@@ -83,7 +83,7 @@
   (tutorial) $ cat myapp.py
 
   def app(environ, start_response):
-      data = "Hello, World!\n"
+      data = b"Hello, World!\n"
       start_response("200 OK", [
           ("Content-Type", "text/plain"),
           ("Content-Length", str(len(data)))