diff --git a/package-lock.json b/package-lock.json
index e42f074..845a08d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ol-tilecache",
-  "version": "3.0.2",
+  "version": "4.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 87d7833..e24183b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ol-tilecache",
-  "version": "3.0.2",
+  "version": "4.0.0",
   "description": "OpenLayers tile url function to load tile seeded with TileCache url scheme",
   "main": "dist/bundle.js",
   "module": "dist/bundle.es.js",