diff --git a/package.json b/package.json
index 6ac07688a..3e95ae96f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tileserver-gl",
-  "version": "3.1.1",
+  "version": "4.0.0",
   "description": "Map tile server for JSON GL styles - vector and server side generated raster tiles",
   "main": "src/main.js",
   "bin": "src/main.js",