diff --git a/package-lock.json b/package-lock.json
index 0bdae84..cbc3f3e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "stampit",
-  "version": "4.3.2",
+  "version": "5.0.0-next",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "stampit",
-      "version": "4.3.2",
+      "version": "5.0.0-next",
       "license": "MIT",
       "devDependencies": {
         "benchmark": "^2.1.4",
diff --git a/package.json b/package.json
index fbef166..90bbf8f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "stampit",
-  "version": "4.3.2",
+  "version": "5.0.0-next",
   "description": "Create objects from reusable, composable behaviors.",
   "author": {
     "name": "Eric Elliott",