diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 16502c3..44b10ef 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1 +1 @@
-{".":"4.0.0"}
+{".":"4.1.0"}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 305adce..cc9aec4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 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.
 
+## [4.1.0](https://github.com/MapColonies/openapi-express-viewer/compare/v4.0.0...v4.1.0) (2025-07-31)
+
+
+### Features
+
+* add optional custom ability ([#43](https://github.com/MapColonies/openapi-express-viewer/issues/43)) ([f25ecba](https://github.com/MapColonies/openapi-express-viewer/commit/f25ecba6cbd5af7a08fc41cc7ef6d189efd5d42f))
+
 ## [4.0.0](https://github.com/MapColonies/openapi-express-viewer/compare/v3.0.0...v4.0.0) (2025-02-03)
 
 
diff --git a/package-lock.json b/package-lock.json
index 10c6b0a..f4a0605 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@map-colonies/openapi-express-viewer",
-  "version": "4.0.0",
+  "version": "4.1.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@map-colonies/openapi-express-viewer",
-      "version": "4.0.0",
+      "version": "4.1.0",
       "license": "ISC",
       "dependencies": {
         "http-status-codes": "^2.3.0",
diff --git a/package.json b/package.json
index 910c6c8..fbeffcb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@map-colonies/openapi-express-viewer",
-  "version": "4.0.0",
+  "version": "4.1.0",
   "description": "A package for openapi ui middleware for express",
   "main": "./dist/index.js",
   "exports": {