diff --git a/package.json b/package.json
index 5b26311..70301d3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aedes-persistence-mongodb",
-  "version": "9.1.0",
+  "version": "9.1.1",
   "description": "MongoDB persistence for Aedes ",
   "main": "persistence.js",
   "scripts": {