diff --git a/src/lang/en.json b/src/lang/en.json
index 3d70d6f20..fdcb3706e 100644
--- a/src/lang/en.json
+++ b/src/lang/en.json
@@ -88,6 +88,7 @@
"upsideDownModeDescription": "Flip the status upside down. If the service is reachable, it is DOWN.",
"ignoreSecWebsocketAcceptHeaderDescription": "Allows the server to not reply with Sec-WebSocket-Accept header, if the websocket upgrade succeeds.",
"Ignore Sec-WebSocket-Accept header": "Ignore {0} header",
+ "wsSubprotocolDescription": "For more information on subprotocols, please consult the {documentation}",
"WebSocket Application Messaging Protocol": "WAMP (The WebSocket Application Messaging Protocol)",
"Session Initiation Protocol": "WebSocket Transport for SIP (Session Initiation Protocol)",
"Network API for Notification Channel": "OMA RESTful Network API for Notification Channel",
diff --git a/src/pages/EditMonitor.vue b/src/pages/EditMonitor.vue
index 6af2d4669..559f77fdb 100644
--- a/src/pages/EditMonitor.vue
+++ b/src/pages/EditMonitor.vue
@@ -191,6 +191,11 @@
+