diff --git a/package-lock.json b/package-lock.json
index 00737ed..1ac0528 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "koa-compress",
-  "version": "3.1.0",
+  "version": "4.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 7515c22..51ce728 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "koa-compress",
   "description": "Compress middleware for koa",
-  "version": "3.1.0",
+  "version": "4.0.0",
   "author": {
     "name": "Jonathan Ong",
     "email": "me@jongleberry.com",