diff --git a/CHANGELOG.md b/CHANGELOG.md
index c3d7d7c..ee89aa1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.0] - 2020-02-25
+
+Compatible with [Eth2 spec 0.10.1](https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/specs/phase0/beacon-chain.md#bls-signatures) 
+and [IETF draft bls specification](https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/specs/phase0/beacon-chain.md#bls-signatures)
+
+### BREAKING CHANGES
+
+- domain param is removed from all apis
+- message length constraint is changed
+
 ## [0.3.0] - 2020-02-20
 
 ### BREAKING CHANGES
diff --git a/package.json b/package.json
index 6f523c1..a203377 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chainsafe/bls",
-  "version": "0.3.0",
+  "version": "1.0.0",
   "description": "Implementation of bls signature verification for ethereum 2.0",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",