diff --git a/README.md b/README.md
index 201b5c9..64b7c79 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,8 @@ At runtime, the server needs the vetificate file and the related key file. These
 
     mxshadowserv --key-file FILENAME --cert-file FILENAME [--address ADDRESS] [--port PORT} SHADOW-FILEANME
 
+The server monitors the shadow file for changes and will re-read it if it is changed or replaced.
+
 Additionally, the source package contains these tools, which are build but not installed:
 
 * create-key.sh : Shell script to create key and certificat for the server