diff --git a/README.md b/README.md
index bdc37e0..4cd24f2 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,8 @@ Edit the file `beacon/connections/mongo/conf.py` and set `database_certificate`
 
 * The MongoDB client certificate should be in the combined PEM format `client.key + "\n" + client.crt`
 
+For more information and have a testing on TLS, please go to [mongoDB official documentation website](https://www.mongodb.com/docs/v7.1/appendix/security/appendixA-openssl-ca/).
+
 ## Prerequisites
 
 You should have installed: