diff --git a/package-lock.json b/package-lock.json
index ac59615b..620d7120 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "zotero-web-library",
-  "version": "1.4.3",
+  "version": "1.5.0-rc.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "zotero-web-library",
-      "version": "1.4.3",
+      "version": "1.5.0-rc.0",
       "license": "AGPL-3.0",
       "dependencies": {
         "@babel/runtime": "^7.24.5",
diff --git a/package.json b/package.json
index 5725645d..3fc637f7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zotero-web-library",
-  "version": "1.4.3",
+  "version": "1.5.0-rc.0",
   "description": "Web library from zotero.org",
   "main": "src/js/zotero-web-library.js",
   "files": [