diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2cfcdc5..9f8ba24 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,24 @@
 # Changelog
 
-## [1.2.2](https://github.com/seegno/bookshelf-json-columns/tree/1.2.2)
+## [2.0.0](https://github.com/seegno/bookshelf-json-columns/tree/2.0.0) (2016-10-25)
+[Full Changelog](https://github.com/seegno/bookshelf-json-columns/compare/1.2.2...2.0.0)
 
+**Closed issues:**
+
+- Idea: automatic string to Date conversion [\#34](https://github.com/seegno/bookshelf-json-columns/issues/34)
+
+**Merged pull requests:**
+
+- Add .nycrc to .npmignore [\#40](https://github.com/seegno/bookshelf-json-columns/pull/40) ([ricardogama](https://github.com/ricardogama))
+- Remove knex client duplicate condition [\#39](https://github.com/seegno/bookshelf-json-columns/pull/39) ([ricardogama](https://github.com/ricardogama))
+- Add node version badge [\#38](https://github.com/seegno/bookshelf-json-columns/pull/38) ([ricardogama](https://github.com/ricardogama))
+- Add .npmignore [\#37](https://github.com/seegno/bookshelf-json-columns/pull/37) ([abelsoares](https://github.com/abelsoares))
+- Update dependencies versions [\#36](https://github.com/seegno/bookshelf-json-columns/pull/36) ([ricardogama](https://github.com/ricardogama))
+- Update jsonColumns option to be a class property [\#35](https://github.com/seegno/bookshelf-json-columns/pull/35) ([ricardogama](https://github.com/ricardogama))
+- Test against Node.js 6 [\#33](https://github.com/seegno/bookshelf-json-columns/pull/33) ([MarkHerhold](https://github.com/MarkHerhold))
+- Add release script [\#24](https://github.com/seegno/bookshelf-json-columns/pull/24) ([ricardogama](https://github.com/ricardogama))
+
+## [1.2.2](https://github.com/seegno/bookshelf-json-columns/tree/1.2.2) (2016-09-20)
 [Full Changelog](https://github.com/seegno/bookshelf-json-columns/compare/1.2.1...1.2.2)
 
 **Closed issues:**
@@ -100,4 +117,4 @@
 
 
 
-\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*
+\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*
\ No newline at end of file
diff --git a/dist/index.js b/dist/index.js
index d40adf5..31704f8 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -4,39 +4,21 @@ Object.defineProperty(exports, "__esModule", {
   value: true
 });
 
-var _keys = require('babel-runtime/core-js/object/keys');
-
-var _keys2 = _interopRequireDefault(_keys);
-
-var _extends2 = require('babel-runtime/helpers/extends');
-
-var _extends3 = _interopRequireDefault(_extends2);
-
-var _typeof2 = require('babel-runtime/helpers/typeof');
-
-var _typeof3 = _interopRequireDefault(_typeof2);
-
-var _stringify = require('babel-runtime/core-js/json/stringify');
-
-var _stringify2 = _interopRequireDefault(_stringify);
-
-function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
 
 /**
  * Stringify JSON columns.
  */
 
 function stringify(model, attributes, options) {
-  var _this = this;
-
   // Do not stringify with `patch` option.
   if (options && options.patch) {
     return;
   }
 
-  this.jsonColumns.forEach(function (column) {
-    if (_this.attributes[column]) {
-      _this.attributes[column] = (0, _stringify2.default)(_this.attributes[column]);
+  this.constructor.jsonColumns.forEach(column => {
+    if (this.attributes[column]) {
+      this.attributes[column] = JSON.stringify(this.attributes[column]);
     }
   });
 }
@@ -46,16 +28,14 @@ function stringify(model, attributes, options) {
  */
 
 function parse(model, response, options) {
-  var _this2 = this;
-
   // Do not parse with `patch` option.
   if (options && options.patch) {
     return;
   }
 
-  this.jsonColumns.forEach(function (column) {
-    if (_this2.attributes[column]) {
-      _this2.attributes[column] = JSON.parse(_this2.attributes[column]);
+  this.constructor.jsonColumns.forEach(column => {
+    if (this.attributes[column]) {
+      this.attributes[column] = JSON.parse(this.attributes[column]);
     }
   });
 }
@@ -64,13 +44,14 @@ function parse(model, response, options) {
  * Export `bookshelf-json-columns` plugin.
  */
 
-exports.default = function (Bookshelf) {
-  var Model = Bookshelf.Model.prototype;
-  var client = Bookshelf.knex.client.config.client;
+exports.default = Bookshelf => {
+  const Model = Bookshelf.Model.prototype;
+  const client = Bookshelf.knex.client.config.client;
+  const parseOnFetch = client === 'sqlite' || client === 'sqlite3';
 
   Bookshelf.Model = Bookshelf.Model.extend({
     initialize: function initialize() {
-      if (!this.jsonColumns) {
+      if (!this.constructor.jsonColumns) {
         return Model.initialize.apply(this, arguments);
       }
 
@@ -80,7 +61,7 @@ exports.default = function (Bookshelf) {
       // Parse JSON columns after model is saved.
       this.on('saved', parse.bind(this));
 
-      if (client === 'sqlite' || client === 'sqlite3') {
+      if (parseOnFetch) {
         // Parse JSON columns after model is fetched.
         this.on('fetched', parse.bind(this));
       }
@@ -88,21 +69,19 @@ exports.default = function (Bookshelf) {
       return Model.initialize.apply(this, arguments);
     },
     save: function save(key, value, options) {
-      var _this3 = this;
-
-      if (!this.jsonColumns) {
+      if (!this.constructor.jsonColumns) {
         return Model.save.apply(this, arguments);
       }
 
       // Handle arguments as Bookshelf.
-      var attributes = void 0;
+      let attributes;
 
-      if (key === null || (typeof key === 'undefined' ? 'undefined' : (0, _typeof3.default)(key)) === 'object') {
+      if (key === null || typeof key === 'object') {
         attributes = key || {};
-        options = value ? (0, _extends3.default)({}, value) : {};
+        options = value ? _extends({}, value) : {};
       } else {
         (attributes = {})[key] = value;
-        options = options ? (0, _extends3.default)({}, options) : {};
+        options = options ? _extends({}, options) : {};
       }
 
       // Only handle arguments with `patch` option.
@@ -111,16 +90,16 @@ exports.default = function (Bookshelf) {
       }
 
       // Stringify JSON columns.
-      (0, _keys2.default)(attributes).forEach(function (attribute) {
-        if (_this3.jsonColumns.indexOf(attribute) !== -1 && attributes[attribute]) {
-          attributes[attribute] = (0, _stringify2.default)(attributes[attribute]);
+      Object.keys(attributes).forEach(attribute => {
+        if (this.constructor.jsonColumns.indexOf(attribute) !== -1 && attributes[attribute]) {
+          attributes[attribute] = JSON.stringify(attributes[attribute]);
         }
       });
 
-      return Model.save.call(this, attributes, options).then(function (model) {
+      return Model.save.call(this, attributes, options).then(model => {
         // Parse JSON columns.
-        (0, _keys2.default)(attributes).forEach(function (attribute) {
-          if (_this3.jsonColumns.indexOf(attribute) !== -1) {
+        Object.keys(attributes).forEach(attribute => {
+          if (this.constructor.jsonColumns.indexOf(attribute) !== -1) {
             model.attributes[attribute] = JSON.parse(model.attributes[attribute]);
           }
         });
@@ -130,28 +109,28 @@ exports.default = function (Bookshelf) {
     }
   });
 
-  if (client === 'sqlite' || client === 'sqlite3') {
-    (function () {
-      var Collection = Bookshelf.Collection.prototype;
+  if (!parseOnFetch) {
+    return;
+  }
 
-      Bookshelf.Collection = Bookshelf.Collection.extend({
-        initialize: function initialize() {
-          if (!this.model.prototype.jsonColumns) {
-            return Collection.initialize.apply(this, arguments);
-          }
+  const Collection = Bookshelf.Collection.prototype;
 
-          // Parse JSON columns after collection is fetched.
-          this.on('fetched', function (collection) {
-            collection.models.forEach(function (model) {
-              parse.apply(model);
-            });
-          });
+  Bookshelf.Collection = Bookshelf.Collection.extend({
+    initialize: function initialize() {
+      if (!this.model.jsonColumns) {
+        return Collection.initialize.apply(this, arguments);
+      }
 
-          return Collection.initialize.apply(this, arguments);
-        }
+      // Parse JSON columns after collection is fetched.
+      this.on('fetched', collection => {
+        collection.models.forEach(model => {
+          parse.apply(model);
+        });
       });
-    })();
-  }
+
+      return Collection.initialize.apply(this, arguments);
+    }
+  });
 };
 
 module.exports = exports['default'];
\ No newline at end of file
diff --git a/package.json b/package.json
index 8b9b44a..5d8ca2d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bookshelf-json-columns",
-  "version": "1.2.2",
+  "version": "2.0.0",
   "description": "Parse JSON columns with Bookshelf.js",
   "license": "MIT",
   "author": {