diff --git a/package-lock.json b/package-lock.json
index 56ad4db..9a70446 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "maquette",
-  "version": "3.6.0",
+  "version": "4.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "maquette",
-      "version": "3.6.0",
+      "version": "4.0.0",
       "license": "MIT",
       "devDependencies": {
         "@types/chai-as-promised": "7.1.8",
diff --git a/package.json b/package.json
index 0accb4d..fb42649 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "animation",
     "transitions"
   ],
-  "version": "3.6.0",
+  "version": "4.0.0",
   "author": "Johan Gorter <johan@johangorter.com>",
   "repository": {
     "type": "git",