diff --git a/book/references.bib b/book/references.bib
index 4fc0c3f..8e306d6 100644
--- a/book/references.bib
+++ b/book/references.bib
@@ -3,6 +3,6 @@
   author={Idema, Timon},
   institution ={Delft University of Technology},
   howpublished={\url{https://gitlab.tudelft.nl/opentextbooks/latex-to-markdown-conversion}},
-  year={2024}
+  year={2024},
   note={Shared on TU Delft GitLab}
 }
\ No newline at end of file