diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6ea05989d..67af709a8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ Dates are formatted as YYYY-MM-DD.
 
 ## Unreleased
 
+## [5.0.0-beta.1]
+
 ### Changed
 
 ### [Minor BC break] Reducing file size / tree shaking
diff --git a/package-lock.json b/package-lock.json
index c4b7c4e16..9362ece11 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "immutable",
-  "version": "4.3.3",
+  "version": "5.0.0-beta.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "immutable",
-      "version": "4.3.3",
+      "version": "5.0.0-beta.1",
       "license": "MIT",
       "devDependencies": {
         "@size-limit/esbuild-why": "^8.2.6",
diff --git a/package.json b/package.json
index f1ebf9439..015a5fc86 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "immutable",
-  "version": "4.3.3",
+  "version": "5.0.0-beta.1",
   "description": "Immutable Data Collections",
   "license": "MIT",
   "homepage": "https://immutable-js.com",