diff --git a/tidy.Rmd b/tidy.Rmd
index a06bf20..48256b9 100644
--- a/tidy.Rmd
+++ b/tidy.Rmd
@@ -4,6 +4,8 @@ title: Tidy Data
 output: bookdown::html_chapter
 ---
 
+# Tidy data
+
 > "Tidy datasets are all alike but every messy dataset is messy in its
 > own way." – Hadley Wickham