diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5c23c9f..c7ba50c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,13 @@
 
 **Note**: Gaps between patch versions are faulty/broken releases.
 
+## v0.3.0
+
+**Warning**. If you don't rely in your codebase on the property `maybe(MyType)(undefined) === null` this **is not a breaking change** for you.
+
+- **Breaking Change**
+  - upgrade to `tcomb` v3.0.0
+
 ## v0.2.5
 
 - **New Feature**
diff --git a/package.json b/package.json
index 243b1d7..583d7af 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "tcomb-json-schema",
-  "version": "0.2.5",
+  "version": "0.3.0",
   "description": "Transforms a JSON Schema to a tcomb type",
   "main": "index.js",
   "files": [
@@ -23,7 +23,7 @@
   "homepage": "https://github.com/gcanti/tcomb-json-schema",
   "dependencies": {
     "fcomb": "^0.1.0",
-    "tcomb": "^2.2.0"
+    "tcomb": "^3.0.0"
   },
   "devDependencies": {
     "eslint": "1.10.3",