diff --git a/book/book.toml b/book/book.toml
index bfb9fae..7942651 100644
--- a/book/book.toml
+++ b/book/book.toml
@@ -4,3 +4,6 @@ language = "en"
 multilingual = false
 src = "src"
 title = "Training Program Exercises"
+
+[output.html]
+site-url = "book"
\ No newline at end of file