diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e93eb9..fc1f2af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,6 @@
 
+## v4.0.0-0 (2024-07-17)
+
 ## v3.1.1 (2024-01-12)
 
 #### :bug: Bug Fix
diff --git a/ember-launch-darkly/package.json b/ember-launch-darkly/package.json
index 4f57f83..7aaebb8 100644
--- a/ember-launch-darkly/package.json
+++ b/ember-launch-darkly/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ember-launch-darkly",
-  "version": "3.1.1",
+  "version": "4.0.0-0",
   "description": "A modern Ember addon to wrap the Launch Darkly service",
   "keywords": [
     "ember-addon"
diff --git a/package.json b/package.json
index fbdbdb4..a5880af 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ember-launch-darkly",
-  "version": "3.1.1",
+  "version": "4.0.0-0",
   "private": true,
   "workspaces": [
     "ember-launch-darkly",
diff --git a/test-app/package.json b/test-app/package.json
index abab182..9c15326 100644
--- a/test-app/package.json
+++ b/test-app/package.json
@@ -1,6 +1,6 @@
 {
   "name": "test-app",
-  "version": "3.1.1",
+  "version": "4.0.0-0",
   "private": true,
   "description": "Small description for test-app goes here",
   "repository": "",
@@ -40,7 +40,7 @@
     "ember-cli-inject-live-reload": "^2.1.0",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-terser": "^4.0.2",
-    "ember-launch-darkly": "3.1.1",
+    "ember-launch-darkly": "4.0.0-0",
     "ember-load-initializers": "^2.1.2",
     "ember-modifier": "^4.1.0",
     "ember-page-title": "^7.0.0",