diff --git a/package.json b/package.json
index 00aa425a3..8d785b424 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "focus-components",
-    "version": "2.2.0",
+    "version": "2.2.1",
     "description": "Focus component repository.",
     "main": "index.js",
     "scripts": {
diff --git a/src/components/dropdown/action-menu.js b/src/components/dropdown/action-menu.js
index a7bafced2..319fd9ecc 100644
--- a/src/components/dropdown/action-menu.js
+++ b/src/components/dropdown/action-menu.js
@@ -1,8 +1,11 @@
 import React, { Component } from 'react';
-import Button from '../../components/button';
 import { translate } from 'focus-core/translation';
 import noop from 'lodash/utility/noop'
 
+import Button from '../../components/button';
+import MDBehaviour from '../../behaviours/material';
+
+@MDBehaviour('dropdown')
 /**
  * Action menu component
  * 
diff --git a/src/components/dropdown/index.js b/src/components/dropdown/index.js
index db864c80d..cd27f7876 100644
--- a/src/components/dropdown/index.js
+++ b/src/components/dropdown/index.js
@@ -1,8 +1,6 @@
 import React, { Component, PropTypes } from 'react';
 import ReactDOM from 'react-dom';
-
 import uuid from 'uuid';
-import 'material-design-lite/material';
 
 import ActionMenu from './action-menu';
 
@@ -28,27 +26,6 @@ class Dropdown extends Component {
         this._htmlId = uuid.v4();
     }
 
-    /** @inheritdoc */
-    componentDidMount() {
-        if (0 !== this.props.operationList.length && ReactDOM.findDOMNode(this.refs.dropdown)) {
-            componentHandler.upgradeElement(ReactDOM.findDOMNode(this.refs.dropdown));
-        }
-    }
-
-    /** @inheritdoc */
-    componentWillReceiveProps(nextProps) {
-        if (0 !== nextProps.operationList.length && ReactDOM.findDOMNode(this.refs.dropdown)) {
-            componentHandler.upgradeElement(ReactDOM.findDOMNode(this.refs.dropdown));
-        }
-    }
-
-    /** @inheritdoc */
-    componentWillUnmount() {
-        if (0 !== this.props.operationList.length && ReactDOM.findDOMNode(this.refs.dropdown)) {
-            componentHandler.downgradeElements(ReactDOM.findDOMNode(this.refs.dropdown));
-        }
-    }
-
     /** @inheritdoc */
     render() {
         const { iconProps, operationList, position, shape } = this.props;
diff --git a/src/components/input/autocomplete-select-multiple/field.js b/src/components/input/autocomplete-select-multiple/field.js
index e65902ae3..58fb4f263 100644
--- a/src/components/input/autocomplete-select-multiple/field.js
+++ b/src/components/input/autocomplete-select-multiple/field.js
@@ -68,7 +68,12 @@ class MultiAutocomplete extends Component {
      */
     validate() {
         // do nothing, validation is done at each selection
-        return true;
+        const { isRequired } = this.props;
+        return ({
+            isValid: !isRequired || (this.props.value && this.props.value.length > 0),
+            message: 'field.required'
+        });
+
     }
 
     /**
diff --git a/src/index.js b/src/index.js
index dc825c416..837ddf3fa 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,5 +1,5 @@
 //Generator http://patorjk.com/software/taag/#p=display&h=1&f=Banner4&t=Focus-COMPONENTS
-import './style';
+// import './style';
 import translation from 'focus-core/translation';
 import history from 'focus-core/history';