diff --git a/CHANGELOG.md b/CHANGELOG.md
index f4f929a..66a8bfc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [dev]
 
+## [4.0.0] - 2020-08-31
+
 ### BREAKING CHANGES
 * Signature.verifyAggregate now takes decompressed pubkeys instead of raw bytes of compressed key
 
diff --git a/package.json b/package.json
index 20c8b46..a7d80a8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chainsafe/bls",
-  "version": "3.0.0",
+  "version": "4.0.0",
   "description": "Implementation of bls signature verification for ethereum 2.0",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",