diff --git a/ts/src/connections/package.json b/ts/src/connections/package.json
index 39242aac..f80ee01d 100644
--- a/ts/src/connections/package.json
+++ b/ts/src/connections/package.json
@@ -23,6 +23,7 @@
 		"hyco-websocket": "1.0.5",
 		"uuid": "^3.3.3",
 		"await-semaphore": "^0.1.3",
-		"websocket": "^1.0.28"
+		"websocket": "^1.0.28",
+		"es5-ext": "0.10.53"
 	}
 }