diff --git a/main.py b/main.py
index 3218e03..9659f4d 100755
--- a/main.py
+++ b/main.py
@@ -4,10 +4,8 @@
 # GET me using a web browser,
 # executing my code with a Python interpreter called by a CGI-compliant webserver!
 # Example URI:
-#   http://www.example.org/path/main.py?format=format&title=title&author=author
+#   http://www.example.org/path/main.py?title=title&author=author
 # where:
-#   format:
-#       choose output format. Can be either `json` or `html` (default)
 #   title:
 #       title of the book to filter (optional)
 #   author: