diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..04f9c23
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,13 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
+
+## [0.3.1]
+
+### Fixed
+
+- Axios version to `0.18.1` due the CVE-2019-10742
+- Fix the `subject` attribute unmarshal error: issue
+[#32](https://github.com/cloudevents/sdk-javascript/issues/32)
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a992b73..f9a7a41 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -12,6 +12,11 @@ ahead of `master`.
 
 - [Gitflow](https://nvie.com/posts/a-successful-git-branching-model/) by @nvie
 
+## Changelog
+
+Always update the [CHANGELOG.md](./CHANGELOG.md), following
+[this semantics](https://keepachangelog.com/en/1.0.0/).
+
 ## Pull Requests
 
 Guidelines about how to perform pull requests.
diff --git a/README.md b/README.md
index 0d0f420..a5450cd 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 [![downloads](https://img.shields.io/npm/dy/cloudevents-sdk.svg)](https://www.npmjs.com/package/cloudevents-sdk)
 [![npm version](https://img.shields.io/npm/v/cloudevents-sdk.svg)](https://www.npmjs.com/package/cloudevents-sdk)
 [![dependencies](https://david-dm.org/cloudevents/sdk-javascript.svg)](https://david-dm.org/cloudevents/sdk-javascript)
+[![vulnerabilities](https://snyk.io/test/github/cloudevents/sdk-javascript/badge.svg)](https://snyk.io/test/github/cloudevents/sdk-javascript)
 
 # sdk-javascript
 
@@ -12,6 +13,8 @@ Official CloudEvents' SDK for JavaScript.
 
 <img src="https://github.com/cncf/artwork/blob/master/projects/cloudevents/horizontal/color/cloudevents-horizontal-color.png" width="300" height="58" alt="CloudEvents logo">
 
+__Checkout the [changelog](./CHANGELOG.md) to see what's going on!__
+
 ## Contributing
 
 Before create an awesome PR, please read our [guidelines](./CONTRIBUTING.md).
diff --git a/lib/bindings/http/receiver_structured_0_3.js b/lib/bindings/http/receiver_structured_0_3.js
index f5c04f1..45f0982 100644
--- a/lib/bindings/http/receiver_structured_0_3.js
+++ b/lib/bindings/http/receiver_structured_0_3.js
@@ -51,6 +51,10 @@ setterByAttribute[Constants.STRUCTURED_ATTRS_03.CONTENT_TYPE] = {
   name: "dataContentType",
   parser: (v) => v
 };
+setterByAttribute[Constants.STRUCTURED_ATTRS_03.SUBJECT] = {
+  name: "subject",
+  parser: (v) => v
+};
 setterByAttribute[Constants.STRUCTURED_ATTRS_03.DATA] = {
   name: "data",
   parser: (v) => v
diff --git a/package.json b/package.json
index 4e4ff35..8e1103b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cloudevents-sdk",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "CloudEvents SDK for JavaScript",
   "main": "index.js",
   "scripts": {
@@ -32,7 +32,7 @@
   "homepage": "https://github.com/cloudevents/sdk-javascript#readme",
   "dependencies": {
     "ajv": "^6.7.0",
-    "axios": "0.18.0",
+    "axios": "0.18.1",
     "is-empty": "1.2.0",
     "uri-js": "4.2.2",
     "uuid": "3.3.2"
diff --git a/test/bindings/http/unmarshaller_0_3_tests.js b/test/bindings/http/unmarshaller_0_3_tests.js
index 421b194..9304451 100644
--- a/test/bindings/http/unmarshaller_0_3_tests.js
+++ b/test/bindings/http/unmarshaller_0_3_tests.js
@@ -9,7 +9,7 @@ const webhook     = "https://cloudevents.io/webhook";
 const contentType = "application/cloudevents+json; charset=utf-8";
 const now         = new Date();
 const schemaurl   = "http://cloudevents.io/schema.json";
-
+const subject     = "subject.ext";
 const ceContentType = "application/json";
 
 const data = {
@@ -118,9 +118,10 @@ describe("HTTP Transport Binding Unmarshaller for CloudEvents v0.3", () => {
         new Cloudevent(v03.Spec)
           .type(type)
           .source(source)
-          .contenttype(ceContentType)
+          .dataContentType(ceContentType)
           .time(now)
           .schemaurl(schemaurl)
+          .subject(subject)
           .data(data)
           .toString();