diff --git a/README.md b/README.md
index 410f5760b28a78719c8b82c70891783701812ecc..5254df62addadde03c6e808b57bb1a40a6c2ce7d 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ Use this bibtex to cite our paper:
   journal = {Chemical Engineering Research and Design},
   pages = {161-168},
   volume = {202},
-  doi = {10.1016/j.cherd.2023.12.005}
+  doi = {10.1016/j.cherd.2023.12.005},
   url = {https://www.sciencedirect.com/science/article/pii/S0263876223007979?dgcid=author},
 }