Webpack Uglify causes routing to stop work

When I uglify webpack bundle, routing stops work without any error message or log message. I am using oclazyload to lazy load.

Here is the code in app.route.js

module.exports = function (app) {
var routeConfig = function ($stateProvider) {
    $stateProvider
.state('home', {
            url: '/',
            templateUrl: 'app/dashboard/dashboard.min.html',
            title: 'Home',
            ncyBreadcrumb: {
                label: 'Home'
            }
        })
        .state('organizationStructure', {
            url: '/organizationStructure',
            templateUrl: 'app/admin/organizationStructure/manageHierarchy/manageHierarchyShell.min.html',
            'abstract': true,
            ncyBreadcrumb: {
                skip: true
            },
            resolve: ['$q', '$ocLazyLoad', function ($q, $ocLazyLoad) {
                var deferred = $q.defer();

                require.ensure([], function () {
                    var mod = require('./organizationStructure.module.js');
                    $ocLazyLoad.load({
                        name: 'app.organizationStructure'
                    });
                    deferred.resolve(mod.controller);
                });

                return deferred.promise;
            }]
        })
        .state('organizationStructure.organization', {
            url: '/organization',
            templateUrl: 'app/admin/organizationStructure/manageHierarchy/organization/index.min.html',
            controller: 'ManageOrganization',
            controllerAs: 'vm',
            title: 'Manage Organization',
            ncyBreadcrumb: {
                label: 'Manage Organization',
                parent: 'home'
            }
        });
}

app.config(routeConfig);
return routeConfig;

};

Here is the code in app.module.js

var app = angular.module('app', [
'ui.router',
'restangular',
'ui.bootstrap',
'ncy-angular-breadcrumb',
'oc.lazyLoad'

]);

//Base Route require('./app.route.js')(app);

When I minify the bundle, app routing stops working. Otherwise it works fine. Please provide me a solution. Also I am using ngAnnotate. Dependencies are injected safely in minified file.