diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7f3bbf2..9843ad6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [2.1.0](https://github.com/tonioriol/transmutant/compare/v2.0.0...v2.1.0) (2024-10-30)
+
+
+### Features
+
+* enforce strict return types in transformation functions ([bb575df](https://github.com/tonioriol/transmutant/commit/bb575dfd605934d76627867ed507567591c86317))
+
 ## [2.0.0](https://github.com/tonioriol/transmutant/compare/v1.0.1...v2.0.0) (2024-10-28)
 
 
diff --git a/package-lock.json b/package-lock.json
index 4ef1f97..6c2d6eb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "transmutant",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "transmutant",
-      "version": "2.0.0",
+      "version": "2.1.0",
       "license": "MIT",
       "devDependencies": {
         "@types/jest": "^29.5.14",
diff --git a/package.json b/package.json
index 1abb104..299b0b4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "transmutant",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "files": [