diff --git a/frontend/app/components/common/lodash/lodash.service.test.ts b/frontend/app/components/common/lodash/lodash.service.test.ts
deleted file mode 100644
index dec7162301..0000000000
--- a/frontend/app/components/common/lodash/lodash.service.test.ts
+++ /dev/null
@@ -1,41 +0,0 @@
-// -- copyright
-// OpenProject is a project management system.
-// Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
-//
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License version 3.
-//
-// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
-// Copyright (C) 2006-2013 Jean-Philippe Lang
-// Copyright (C) 2010-2013 the ChiliProject Team
-//
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License
-// as published by the Free Software Foundation; either version 2
-// of the License, or (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-//
-// See doc/COPYRIGHT.rdoc for more details.
-// ++
-
-describe('lodash service', () => {
-  var lodash;
-
-  beforeEach(angular.mock.module('openproject.services'));
-
-  beforeEach(angular.mock.inject((___) => {
-    lodash = ___;
-  }));
-
-  it('should return the global lodash instance', () => {
-    expect(lodash.name).to.eq('lodash');
-  });
-});
diff --git a/frontend/app/components/common/lodash/lodash.service.ts b/frontend/app/components/common/lodash/lodash.service.ts
deleted file mode 100644
index 77c61bd7dd..0000000000
--- a/frontend/app/components/common/lodash/lodash.service.ts
+++ /dev/null
@@ -1,37 +0,0 @@
-// -- copyright
-// OpenProject is a project management system.
-// Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
-//
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License version 3.
-//
-// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
-// Copyright (C) 2006-2013 Jean-Philippe Lang
-// Copyright (C) 2010-2013 the ChiliProject Team
-//
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License
-// as published by the Free Software Foundation; either version 2
-// of the License, or (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-//
-// See doc/COPYRIGHT.rdoc for more details.
-// ++
-
-import LoDashStatic = _.LoDashStatic;
-
-function lodash():LoDashStatic {
-  return _;
-}
-
-angular
-  .module('openproject.services')
-  .factory('_', lodash);
diff --git a/frontend/app/components/wp-buttons/wp-filter-button/wp-filter-button.directive.ts b/frontend/app/components/wp-buttons/wp-filter-button/wp-filter-button.directive.ts
index 5f154bcb05..ff6213db06 100644
--- a/frontend/app/components/wp-buttons/wp-filter-button/wp-filter-button.directive.ts
+++ b/frontend/app/components/wp-buttons/wp-filter-button/wp-filter-button.directive.ts
@@ -44,7 +44,7 @@ export class WorkPackageFilterButtonController extends WorkPackageButtonControll
   public buttonId:string = 'work-packages-filter-toggle-button';
   public iconClass:string = 'icon-filter';
 
-  constructor(public I18n, public _, protected wpFiltersService:WorkPackageFiltersService) {
+  constructor(public I18n, protected wpFiltersService:WorkPackageFiltersService) {
     'ngInject';
 
     super(I18n);
@@ -63,7 +63,7 @@ export class WorkPackageFilterButtonController extends WorkPackageButtonControll
   }
 
   public get filterCount():number {
-    return this._.size(_.where(this.filters, filter => !filter.deactivated));
+    return _.size(_.where(this.filters, filter => !filter.deactivated));
   }
 
   public isActive():boolean {