diff --git a/docs/dependencies.md b/docs/dependencies.md
index 8389f080c..da3c25758 100644
--- a/docs/dependencies.md
+++ b/docs/dependencies.md
@@ -27,15 +27,15 @@ AdminLTE makes use of the following plugins. For documentation, updates or licen
   <div class="col-sm-3">
     <ul class="list-unstyled">
       <li><h4>Charts</h4></li>
-      <li><a href="https://www.chartjs.org/" target="_blank">ChartJS</a></li>
-      <li><a href="http://www.flotcharts.org/" target="_blank">Flot</a></li>
-      <li><a href="https://github.com/mariusGundersen/sparkline" target="_blank">Sparkline</a></li>
+      <li><a href="https://www.chartjs.org/" rel="noopener" target="_blank">ChartJS</a></li>
+      <li><a href="http://www.flotcharts.org/" rel="noopener" target="_blank">Flot</a></li>
+      <li><a href="https://github.com/mariusGundersen/sparkline" rel="noopener" target="_blank">Sparkline</a></li>
     </ul>
   </div>
   <div class="col-sm-3">
     <ul class="list-unstyled">
       <li><h4>Editors</h4></li>
-      <li><a href="https://summernote.org/" target="_blank">Summernote</a></li>
+      <li><a href="https://summernote.org/" rel="noopener" target="_blank">Summernote</a></li>
     </ul>
   </div>
   <div class="col-sm-3">
@@ -43,21 +43,21 @@ AdminLTE makes use of the following plugins. For documentation, updates or licen
       <li><h4>Form Elements</h4></li>
       <li><a href="https://farbelous.io/bootstrap-colorpicker/">Bootstrap Colorpicker</a></li>
       <li><a href="https://github.com/seiyria/bootstrap-slider/">Bootstrap Slider</a></li>
-      <li><a href="http://www.daterangepicker.com/" target="_blank">Date Range Picker</a></li>
-      <li><a href="https://github.com/bantikyan/icheck-bootstrap#readme" target="_blank">iCheck Bootstrap</a></li>
-      <li><a href="https://github.com/RobinHerbots/Inputmask/" target="_blank">Inputmask</a></li>
-      <li><a href="http://ionden.com/a/plugins/ion.rangeSlider/" target="_blank">Ion.RangeSlider</a></li>
-      <li><a href="https://select2.org/" target="_blank">Select2</a></li>
-      <li><a href="https://tempusdominus.github.io/bootstrap-4/" target="_blank">Tempus Dominus</a></li>
-      <li><a href="https://github.com/istvan-ujjmeszaros/bootstrap-duallistbox#readme" target="_blank">Bootstrap4 Duallistbox</a></li>
-      <li><a href="https://github.com/Johann-S/bs-custom-file-input#readme" target="_blank">bs-custom-file-input</a></li>
+      <li><a href="http://www.daterangepicker.com/" rel="noopener" target="_blank">Date Range Picker</a></li>
+      <li><a href="https://github.com/bantikyan/icheck-bootstrap#readme" rel="noopener" target="_blank">iCheck Bootstrap</a></li>
+      <li><a href="https://github.com/RobinHerbots/Inputmask/" rel="noopener" target="_blank">Inputmask</a></li>
+      <li><a href="http://ionden.com/a/plugins/ion.rangeSlider/" rel="noopener" target="_blank">Ion.RangeSlider</a></li>
+      <li><a href="https://select2.org/" rel="noopener" target="_blank">Select2</a></li>
+      <li><a href="https://tempusdominus.github.io/bootstrap-4/" rel="noopener" target="_blank">Tempus Dominus</a></li>
+      <li><a href="https://github.com/istvan-ujjmeszaros/bootstrap-duallistbox#readme" rel="noopener" target="_blank">Bootstrap4 Duallistbox</a></li>
+      <li><a href="https://github.com/Johann-S/bs-custom-file-input#readme" rel="noopener" target="_blank">bs-custom-file-input</a></li>
     </ul>
   </div>
   <div class="col-sm-3">
     <ul class="list-unstyled">
       <li><h4>Icon Packs</h4></li>
-      <li><a href="https://fontawesome.com/" target="_blank">FontAwesome 5</a></li>
-      <li><a href="https://github.com/lipis/flag-icon-css#readme" target="_blank">flag-icon-css</a></li>
+      <li><a href="https://fontawesome.com/" rel="noopener" target="_blank">FontAwesome 5</a></li>
+      <li><a href="https://github.com/lipis/flag-icon-css#readme" rel="noopener" target="_blank">flag-icon-css</a></li>
     </ul>
   </div>
 </div>
@@ -65,40 +65,40 @@ AdminLTE makes use of the following plugins. For documentation, updates or licen
   <div class="col-sm-3">
     <ul class="list-unstyled">
       <li><h4>Table Grids</h4></li>
-      <li><a href="https://datatables.net/" target="_blank">DataTables</a></li>
-      <li><a href="http://js-grid.com/" target="_blank">jsGrid</a></li>
+      <li><a href="https://datatables.net/" rel="noopener" target="_blank">DataTables</a></li>
+      <li><a href="http://js-grid.com/" rel="noopener" target="_blank">jsGrid</a></li>
     </ul>
   </div>
   <div class="col-sm-3">
     <ul class="list-unstyled">
       <li><h4>Notifications</h4></li>
-      <li><a href="https://sweetalert2.github.io/" target="_blank">SweetAlert2</a></li>
-      <li><a href="https://codeseven.github.io/toastr/" target="_blank">Toastr</a></li>
+      <li><a href="https://sweetalert2.github.io/" rel="noopener" target="_blank">SweetAlert2</a></li>
+      <li><a href="https://codeseven.github.io/toastr/" rel="noopener" target="_blank">Toastr</a></li>
     </ul>
   </div>
   <div class="col-sm-3">
     <ul class="list-unstyled">
       <li><h4>Others</h4></li>
-      <li><a href="https://github.com/ftlabs/fastclick#readme" target="_blank">FastClick</a></li>
+      <li><a href="https://github.com/ftlabs/fastclick#readme" rel="noopener" target="_blank">FastClick</a></li>
       <li><a href="https://fullcalendar.io/">FullCalendar 4</a></li>
       <li><a href="https://github.com/aterrien/jQuery-Knob#readme">jQuery Knob</a></li>
-      <li><a href="https://jqueryui.com/" target="_blank">jQuery UI</a></li>
-      <li><a href="https://jqueryvalidation.org/" target="_blank">jQuery Validation</a></li>
-      <li><a href="https://www.vincentbroute.fr/mapael/" target="_blank">jQuery Mapael</a></li>
-      <li><a href="https://github.com/bbmumford/jqvmap#readme" target="_blank">jQuery Vector Map</a></li>
-      <li><a href="https://kingsora.github.io/OverlayScrollbars/" target="_blank">Overlay Scrollbars</a></li>
-      <li><a href="https://github.com/lgaitan/pace#readme" target="_blank">Pace Progress</a></li>
-      <li><a href="https://github.com/giotiskl/filterizr#readme" target="_blank">FilterizR</a></li>
+      <li><a href="https://jqueryui.com/" rel="noopener" target="_blank">jQuery UI</a></li>
+      <li><a href="https://jqueryvalidation.org/" rel="noopener" target="_blank">jQuery Validation</a></li>
+      <li><a href="https://www.vincentbroute.fr/mapael/" rel="noopener" target="_blank">jQuery Mapael</a></li>
+      <li><a href="https://github.com/bbmumford/jqvmap#readme" rel="noopener" target="_blank">jQuery Vector Map</a></li>
+      <li><a href="https://kingsora.github.io/OverlayScrollbars/" rel="noopener" target="_blank">Overlay Scrollbars</a></li>
+      <li><a href="https://github.com/lgaitan/pace#readme" rel="noopener" target="_blank">Pace Progress</a></li>
+      <li><a href="https://github.com/giotiskl/filterizr#readme" rel="noopener" target="_blank">FilterizR</a></li>
     </ul>
   </div>
   <div class="col-sm-3">
     <ul class="list-unstyled">
       <li><h4>Plugin Dependencies</h4></li>
-      <li><a href="https://github.com/jquery/jquery-mousewheel#readme" target="_blank">jQuery Mousewheel</a></li>
-      <li><a href="https://momentjs.com/" target="_blank">Moment.js</a></li>
-      <li><a href="https://dmitrybaranovskiy.github.io/raphael/" target="_blank">Raphaël</a></li>
-      <li><a href="https://github.com/bpampuch/pdfmake#readme" target="_blank">pdfmake</a></li>
-      <li><a href="https://github.com/Stuk/jszip#readme" target="_blank">jszip</a></li>
+      <li><a href="https://github.com/jquery/jquery-mousewheel#readme" rel="noopener" target="_blank">jQuery Mousewheel</a></li>
+      <li><a href="https://momentjs.com/" rel="noopener" target="_blank">Moment.js</a></li>
+      <li><a href="https://dmitrybaranovskiy.github.io/raphael/" rel="noopener" target="_blank">Raphaël</a></li>
+      <li><a href="https://github.com/bpampuch/pdfmake#readme" rel="noopener" target="_blank">pdfmake</a></li>
+      <li><a href="https://github.com/Stuk/jszip#readme" rel="noopener" target="_blank">jszip</a></li>
     </ul>
   </div>
 </div>
diff --git a/pages/examples/invoice.html b/pages/examples/invoice.html
index 2c74f909b..57036337e 100644
--- a/pages/examples/invoice.html
+++ b/pages/examples/invoice.html
@@ -871,7 +871,7 @@
               <!-- this row will not appear when printing -->
               <div class="row no-print">
                 <div class="col-12">
-                  <a href="invoice-print.html" target="_blank" class="btn btn-default"><i class="fas fa-print"></i> Print</a>
+                  <a href="invoice-print.html" rel="noopener" target="_blank" class="btn btn-default"><i class="fas fa-print"></i> Print</a>
                   <button type="button" class="btn btn-success float-right"><i class="far fa-credit-card"></i> Submit
                     Payment
                   </button>