diff --git a/CHANGELOG.md b/CHANGELOG.md
index dabf9f843..276831192 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+## [2.9.1](https://github.com/oclif/core/compare/2.9.0...2.9.1) (2023-07-12)
+
+
+### Bug Fixes
+
+* flags omit undefined for boolean flags ([0a7e154](https://github.com/oclif/core/commit/0a7e15415f3514a4baad064478c76f0c17e9548a))
+
+
+
 # [2.9.0](https://github.com/oclif/core/compare/2.8.12...2.9.0) (2023-07-11)
 
 
diff --git a/package.json b/package.json
index 966aeb47b..9c33bc17a 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@oclif/core",
   "description": "base library for oclif CLIs",
-  "version": "2.9.0",
+  "version": "2.9.1",
   "author": "Salesforce",
   "bugs": "https://github.com/oclif/core/issues",
   "dependencies": {