diff --git a/package.json b/package.json
index 3df6de9..87877a2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aedes-cached-persistence",
-  "version": "8.1.1",
+  "version": "9.0.0",
   "description": "Abstract class to write an Aedes persistence with in-process caching of subscriptions",
   "main": "index.js",
   "types": "types/index.d.ts",