diff --git a/README.md b/README.md
index dff7551b2..c27b36835 100644
--- a/README.md
+++ b/README.md
@@ -122,3 +122,4 @@ General: <https://doi.org/10.1038/s41592-019-0344-8>
 - HMDB 5.0: <https://doi.org/10.1093/nar/gkab1062>
 - NPClassifier: <https://doi.org/10.1021/acs.jnatprod.1c00399>
 - ROTL: <https://doi.org/10.1111/2041-210X.12593>
+- Spectral entropy: <https://doi.org/10.1038/s41592-021-01331-z>