diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..aa4e415
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,10 @@
+# Changelog
+
+All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+
+## [0.4.0](https://github.com/jimeh/rubocopfmt.el/compare/0.3.0...0.4.0) (2020-05-19)
+
+
+### Features
+
+* **lsp:** Add experimental use of lsp-format-buffer ([d7d6d81](https://github.com/jimeh/rubocopfmt.el/commit/d7d6d81b520e9d83e2411fc49bd5923cdb0c4aae))
diff --git a/rubocopfmt.el b/rubocopfmt.el
index 75e175b..efa652f 100644
--- a/rubocopfmt.el
+++ b/rubocopfmt.el
@@ -1,6 +1,6 @@
 ;;; rubocopfmt.el --- Minor-mode to format Ruby code with RuboCop on save
 
-;; Version: 0.3.0
+;; Version: 0.4.0
 ;; Keywords: convenience wp edit ruby rubocop
 ;; Package-Requires: ((cl-lib "0.5"))
 ;; URL: https://github.com/jimeh/rubocopfmt.el