diff --git a/warden_client/README b/warden_client/README
index 94e9f720b4f5d7998bace243d16c17380d28bfef..dea36fced4a217e1c0467bd91e5fc1c30b1f2380 100644
--- a/warden_client/README
+++ b/warden_client/README
@@ -53,7 +53,7 @@ C.1. Event description format
    IDEA - Intrusion Detection Extensible Alert, flexible extensible format
 for security events, see:
 
-   https://csirt.cesnet.cz/IDEA
+   https://idea.cesnet.cz/
 
 C.2. Event serial ID