diff --git a/CHANGELOG.md b/CHANGELOG.md
index eb8bf39e..ce620f94 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+### [0.4.1](https://www.github.com/netlify/functions-js/compare/v0.4.0...v0.4.1) (2021-03-26)
+
+
+### Bug Fixes
+
+* add TS files to npm package ([#28](https://www.github.com/netlify/functions-js/issues/28)) ([88a73c6](https://www.github.com/netlify/functions-js/commit/88a73c670fac3ef2449f9bed5604d394e1ecec07))
+
 ## [0.4.0](https://www.github.com/netlify/functions-js/compare/v0.3.1...v0.4.0) (2021-03-26)
 
 
diff --git a/package-lock.json b/package-lock.json
index 0aef612f..61c97c97 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@netlify/functions",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
diff --git a/package.json b/package.json
index 598e6255..79a82616 100644
--- a/package.json
+++ b/package.json
@@ -2,10 +2,11 @@
   "name": "@netlify/functions",
   "main": "./src/main.js",
   "types": "./src/main.d.ts",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "JavaScript utilities for Netlify Functions",
   "files": [
     "src/**/*.js",
+    "src/**/*.ts",
     "!src/**/*.test.js"
   ],
   "scripts": {