diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f4516e..a835f4a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## v4.0.0
+
+- support Earthly CI [fb8bd85](https://github.com/watson/ci-info/commit/fb8bd85)
+- support Prow CI [8e6a591](https://github.com/watson/ci-info/commit/8e6a591)
+- support Vela CI [bb13901](https://github.com/watson/ci-info/commit/bb13901)
+- support Agola CI [ec4e149](https://github.com/watson/ci-info/commit/ec4e149)
+- support Gitea Actions [f6f173f](https://github.com/watson/ci-info/commit/f6f173f)
+- run tests on nodejs v20 [bff314d](https://github.com/watson/ci-info/commit/bff314d)
+
+#### Breaking Changes
+
+- remove Shippable CI [2c5571a](https://github.com/watson/ci-info/commit/2c5571a)
+- remove Solano CI [d6315fc](https://github.com/watson/ci-info/commit/d6315fc)
+
 ## v3.9.0
 
 - better support for Azure Pipelines ([#116](https://github.com/watson/ci-info/pull/116)), [5ea8d85](https://github.com/watson/ci-info/commit/5ea8d85)
diff --git a/package.json b/package.json
index 8d3ff00..3c6b9e4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ci-info",
-  "version": "3.9.0",
+  "version": "4.0.0",
   "description": "Get details about the current Continuous Integration environment",
   "main": "index.js",
   "typings": "index.d.ts",