diff --git a/BookReader/BookReader.js b/BookReader/BookReader.js
index 4967e41bc..d08cca073 100644
--- a/BookReader/BookReader.js
+++ b/BookReader/BookReader.js
@@ -37,7 +37,7 @@ function BookReader(options) {
     this.setup(options);
 }
 
-BookReader.version = "4.0.0-beta";
+BookReader.version = "4.0.0";
 
 // Mode constants
 BookReader.constMode1up = 1;
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 34e8a2e4a..ac45ec89e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,11 +1,11 @@
-# 4.0.0-beta
-V4 was driven by updating BookReader to work inline on the archive.org details page. This required code refactoring (eg: changing ids to classes), and also updating the design so it integrates well with the details page.
+# 4.0.0
+V4 was driven by updating BookReader to work inline on the archive.org details page. This required code refactoring (eg: changing ids to classes), and also updating the design so it integrates well within the details page theatre section.
 
 - BookReader selectors made relative to BookReader. This means it shouldn't interfere with parent page, and also more than one BookReader instance can be on the page.
 - CSS converted to SASS and refactored.
 - New design with full-screen support.
 - URL plugin is extended to support replaceState, and also configure which params are reflected into the URL fragment.
-- WIP JavaScript code is formatted with 2 spaces instead of 4
+- In transition: JavaScript code is formatted with 2 spaces instead of 4
 
 # 3.2.1
 - Fix so initParams normalizes params.page to params.index, to prevent complexity of priority of page versus index.
diff --git a/package-lock.json b/package-lock.json
index a44044b2a..8428c1364 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "bookreader",
-  "version": "4.0.0-beta",
+  "version": "4.0.0",
   "lockfileVersion": 1,
   "dependencies": {
     "anymatch": {
diff --git a/package.json b/package.json
index 7c9b274bc..052cdd34b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bookreader",
-  "version": "4.0.0-beta",
+  "version": "4.0.0",
   "description": "The Internet Archive BookReader.",
   "repository": {
     "type": "git",