diff --git a/book.org b/book.org
index 3db5dfe..ce87c5a 100644
--- a/book.org
+++ b/book.org
@@ -31,7 +31,7 @@
 #+LATEX_HEADER: \usepackage[defaultlines=2,all]{nowidow}
 #+LATEX_HEADER: \usepackage[dutch,AUTO]{polyglossia}
 #+LATEX_HEADER: \academicyear{2023–2024}
-#+LATEX_HEADER: \subtitle{Learn to code with a data-driven platform}
+#+LATEX_HEADER: \subtitle{Improving automated assessment in programming education through educational data mining}
 #+LATEX_HEADER: \titletext{A dissertation submitted to Ghent University in partial fulfilment of\\ the requirements for the degree of Doctor of Computer Science.}
 #+LATEX_HEADER: \promotors{%
 #+LATEX_HEADER: Supervisors:\\