diff --git a/README.md b/README.md
index 7763277e9fccded5443c190b67016360e190768e..0081c43dff24a0ea36bc7607b8ca6e2c1a9cd5ef 100644
--- a/README.md
+++ b/README.md
@@ -34,4 +34,4 @@ devtools::install_git("https://forgemia.inra.fr/imhorphen/mstudentd")
 ## Reference
 
 N. Bouhlel and D. Rousseau (2023), Exact Rényi and Kullback-Leibler Divergences Between Multivariate t-Distributions, IEEE Signal Processing Letters.
-<doi.org/10.1109/LSP.2023.3324594>
+<https://doi.org/10.1109/LSP.2023.3324594>