diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5caa8fe..699a4e6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,17 @@
 
 # Changelog
 
+## 4.0.0
+
+I've been super slow releasing this one, and there's a ton of new stuff.
+
+Importantly, @keeganbrown managed to upgrade nan to 2.0.9 so this should
+work with newer versions of node.
+
+Also a ton of new bindings from @jainanshul
+
+Thanks to the many contributors I haven't named too.
+
 ## 3.2.0
 
 Bugfixes from @mvines and @dropfen. Thanks!
diff --git a/package.json b/package.json
index 88dda82..cd735a3 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,6 @@
 {
   "name": "opencv",
+  "version": "4.0.0",
   "description": "Node Bindings to OpenCV",
   "author": "Peter Braden <peterbraden@peterbraden.co.uk>",
   "dependencies": {
@@ -7,7 +8,6 @@
     "nan": "^2.0.9",
     "node-pre-gyp": "^0.6.11"
   },
-  "version": "3.2.0",
   "devDependencies": {
     "tape": "^3.0.0",
     "aws-sdk": "~2.1.20",