diff --git a/package.json b/package.json
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
     "n3": "^1.16.4",
     "parse-prometheus-text-format": "^1.1.1",
     "reconnectingwebsocket": "^1.0.0",
+    "sub-events": "^1.9.0",
     "sylvester": "^0.0.21",
     "typescript": "^5.0.4",
     "underscore": "^1.13.6",