diff --git a/src/servicebroker-npm/package.json b/src/servicebroker-npm/package.json
index 66f8db26..665886f4 100644
--- a/src/servicebroker-npm/package.json
+++ b/src/servicebroker-npm/package.json
@@ -28,7 +28,7 @@
 		"await-semaphore": "^0.1.3",
 		"cancellationtoken": "^2.2.0",
 		"caught": "^0.1.3",
-		"immutable": "^4.3.1",
+		"immutable": "^5.0.0",
 		"msgpack-lite": "^0.1.26",
 		"nerdbank-streams": "^2.11.79",
 		"strict-event-emitter-types": "^2.0.0",