diff --git a/README.md b/README.md
index 6260ca0..fec9fe1 100644
--- a/README.md
+++ b/README.md
@@ -125,8 +125,12 @@ When profiling (`motus profile`) a metagenomic sample, the mOTUs tool maps the r
 
 ChangeLog
 --------------
+
+**Version 3.1.0 2023-03-28 by AlessioMilanese**
+* Improve database clustering algorithm and update the database (change the number of ext-mOTUs from 19,358 to 20,128)
+
 **Version 3.0.3 2022-07-13 by AlessioMilanese**
-* Add command `prep_long` to allow the profiling of long reads (more information [here](https://github.com/motu-tool/mOTUs/wiki/Profile-long-reads)).
+* Add command `prep_long` to allow the profiling of long reads (more information [here](https://github.com/motu-tool/mOTUs/wiki/Profile-long-reads))
 
 **Version 3.0.2 2022-01-31 by AlessioMilanese**
 * Convert the repository to a python package and submit to PyPI