diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index e6f87756..cf533f28 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.0.0"
+  ".": "4.0.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e8e500a..476798ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [4.0.1](https://github.com/H4ad/serverless-adapter/compare/v4.0.0...v4.0.1) (2023-12-26)
+
+
+### Bug Fixes
+
+* **ci:** missing build part while releasing new version ([5b7d184](https://github.com/H4ad/serverless-adapter/commit/5b7d18410acdc0aa547de2db63cf6347a5715b58))
+
+
+### Documentation
+
+* **blog:** added note about bug related to missing package files ([1d75d91](https://github.com/H4ad/serverless-adapter/commit/1d75d91fe8863c45ae2a7abe44aec6d51d96e44d))
+
 ## [4.0.0](https://github.com/H4ad/serverless-adapter/compare/v3.2.0...v4.0.0) (2023-12-26)
 
 
diff --git a/package-lock.json b/package-lock.json
index 135bc5c8..90011c38 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@h4ad/serverless-adapter",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@h4ad/serverless-adapter",
-      "version": "4.0.0",
+      "version": "4.0.1",
       "license": "MIT",
       "devDependencies": {
         "@apollo/server": "4.9.5",
diff --git a/package.json b/package.json
index dc6f1405..ae91630b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@h4ad/serverless-adapter",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "description": "Run REST APIs and other web applications using your existing Node.js application framework (NestJS, Express, Koa, Hapi, Fastify and many others), on top of AWS, Azure, Digital Ocean and many other clouds.",
   "type": "module",
   "main": "./lib/index.cjs",