diff --git a/docs/docs/configuration/client.rst b/docs/docs/configuration/client.rst
index 7b074b4..ddd09d5 100644
--- a/docs/docs/configuration/client.rst
+++ b/docs/docs/configuration/client.rst
@@ -77,6 +77,11 @@ data-isso-require-email
 
 Set to `true` when spam guard is configured with `require-email = true`.
 
+data-isso-reply-notifications
+-------------------
+
+Set to `true` when reply notifications is configured with `reply-notifications = true`.
+
 data-isso-max-comments-top and data-isso-max-comments-nested
 ------------------------------------------------------------
 
diff --git a/docs/docs/configuration/server.rst b/docs/docs/configuration/server.rst
index 888f9c6..259d9fc 100644
--- a/docs/docs/configuration/server.rst
+++ b/docs/docs/configuration/server.rst
@@ -88,6 +88,14 @@ notify
         Send notifications via SMTP on new comments with activation (if
         moderated) and deletion links.
 
+reply-notifications
+    Allow users to request E-mail notifications for replies to their post.
+
+    It is highly recommended to also turn on moderation when enabling this
+    setting, as Isso can otherwise be easily exploited for sending spam.
+
+    Do not forget to configure the client accordingly.
+
 log-file
     Log console messages to file instead of standard out.