diff --git a/src/js/uppercaseOnly-directive.js b/src/js/uppercaseOnly-directive.js
index 8f8c3e8..4cab819 100644
--- a/src/js/uppercaseOnly-directive.js
+++ b/src/js/uppercaseOnly-directive.js
@@ -2,36 +2,19 @@ angular.module('focaDirectivas')
     .directive('input', [
         function() {
             return {
-                restrict: 'E',
                 require: '?ngModel',
-                link: function(scope, element, attrs, ctrl) {
-
-                    function parser(value) {
-                        if (ctrl.$isEmpty(value)) {
-                            return value;
-                        }
-                        var formatedValue = value.toUpperCase();
-                        if (ctrl.$viewValue !== formatedValue) {
-                            ctrl.$setViewValue(formatedValue);
-                            ctrl.$render();
-                        }
-                        return formatedValue;
-                    }
-
-                    function formatter(value) {
-                        if (ctrl.$isEmpty(value) || typeof value !== 'string') {
-                            return value;
-                        }
-                        return value.toUpperCase();
-                    }
+                link: function(scope, element, attrs, modelCtrl) {
                     if(attrs.type === 'text' &&
                         !attrs.readonly &&
                         !attrs.disabled &&
                         !attrs.uibDatepickerPopup) {
     
-                        ctrl.$formatters.push(formatter);
-                        ctrl.$parsers.push(parser);
+                        modelCtrl.$parsers.push(function(input) {
+                            return input ? input.toUpperCase() : '';
+                        });
                     }
+                    
+                    element.addClass('text-uppercase');
                 }
             };
         }