diff --git a/citations.bib b/citations.bib
index bfe299a..35fce4f 100644
--- a/citations.bib
+++ b/citations.bib
@@ -6,5 +6,6 @@
   number={5},
   pages={2158},
   year={2023},
-  publisher={MDPI}
+  publisher={MDPI},
+  doi={https://doi.org/10.3390/molecules28052158}
 }