diff --git a/package-lock.json b/package-lock.json
index cb3fe52..f68f9c1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "memoize-fs",
-  "version": "3.0.4",
+  "version": "4.0.0-rc-1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "memoize-fs",
-      "version": "3.0.4",
+      "version": "4.0.0-rc-1",
       "license": "MIT",
       "dependencies": {
         "meriyah": "^4.3.4"
diff --git a/package.json b/package.json
index 9093155..c1d4c27 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "memoize-fs",
-  "version": "3.0.4",
+  "version": "4.0.0-rc-1",
   "private": false,
   "type": "module",
   "author": "Boris Diakur (https://borisdiakur.de)",