diff --git a/CHANGELOG.md b/CHANGELOG.md
index 560bf64..a64d2ba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## Changelog
 
+### 4.0.0 (2020-01-21)
+
 - Node.js 12 support is added. Node.js 6 and Node.js 8 support is dropped (breaking change).
 - Mocha, Chai and Istanbul are replaced by [Jest](https://jestjs.io/).
 - Dependencies are upgraded.
diff --git a/package.json b/package.json
index f5693d1..9f616f5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "satellite.js",
-  "version": "3.0.1",
+  "version": "4.0.0",
   "description": "SGP4/SDP4 calculation library",
   "main": "lib/index.js",
   "jsnext:main": "dist/satellite.es.js",