diff --git a/package.json b/package.json
index 84b1e70..9868cdc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zotero-plugin-toolkit",
-  "version": "3.1.0",
+  "version": "4.0.0",
   "description": "Toolkit for Zotero plugins",
   "type": "module",
   "exports": {