diff --git a/assets/tpl/email.html b/assets/tpl/email.html
index ed4988e..b67a683 100644
--- a/assets/tpl/email.html
+++ b/assets/tpl/email.html
@@ -170,7 +170,7 @@
                                             <td class="text-footer1 pb10" style="color:#000000; font-family:'Muli', Arial,sans-serif; font-size:16px; line-height:20px; text-align:center; padding-bottom:10px;">This mail was generated using WireGuard Portal.</td>
                                         </tr>
                                         <tr>
-                                            <td class="text-footer2" style="color:#000000; font-family:'Muli', Arial,sans-serif; font-size:12px; line-height:26px; text-align:center;"><a href="{{.PortalUrl}}" target="_blank" class="link" style="color:#000000; text-decoration:none;"><span class="link" style="color:#000000; text-decoration:none;">Visit WireGuard Portal</span></a></td>
+                                            <td class="text-footer2" style="color:#000000; font-family:'Muli', Arial,sans-serif; font-size:12px; line-height:26px; text-align:center;"><a href="{{.PortalUrl}}" target="_blank" rel="noopener noreferrer" class="link" style="color:#000000; text-decoration:none;"><span class="link" style="color:#000000; text-decoration:none;">Visit WireGuard Portal</span></a></td>
                                         </tr>
                                     </table>
                                 </td>
diff --git a/assets/tpl/index.html b/assets/tpl/index.html
index f46a2eb..aaf7e0b 100644
--- a/assets/tpl/index.html
+++ b/assets/tpl/index.html
@@ -27,7 +27,7 @@
                     <div class="card-body">
                         <h4 class="card-title">Installation</h4>
                         <p class="card-text">Installation instructions for client software can be found on the official WireGuard website.</p>
-                        <a href="https://www.wireguard.com/install/" title="WireGuard Installation" target="_blank" class="btn btn-primary btn-sm">Open Instructions</a>
+                        <a href="https://www.wireguard.com/install/" title="WireGuard Installation" target="_blank" rel="noopener noreferrer" class="btn btn-primary btn-sm">Open Instructions</a>
                     </div>
                 </div>
             </div>
@@ -37,7 +37,7 @@
                     <div class="card-body">
                         <h4 class="card-title">About</h4>
                         <p class="card-text">WireGuard® is an extremely simple yet fast and modern VPN that utilizes state-of-the-art cryptography.</p>
-                        <a href="https://www.wireguard.com/" title="WireGuard" target="_blank" class="btn btn-primary btn-sm">More details</a>
+                        <a href="https://www.wireguard.com/" title="WireGuard" target="_blank" rel="noopener noreferrer" class="btn btn-primary btn-sm">More details</a>
                     </div>
                 </div>
             </div>
@@ -47,7 +47,7 @@
                     <div class="card-body">
                         <h4 class="card-title">WireGuard Portal</h4>
                         <p class="card-text">WireGuard Portal is a simple, web based configuration portal for WireGuard.</p>
-                        <a href="https://github.com/h44z/wg-portal/" title="WireGuard Portal" target="_blank" class="btn btn-primary btn-sm">More details</a>
+                        <a href="https://github.com/h44z/wg-portal/" title="WireGuard Portal" target="_blank" rel="noopener noreferrer" class="btn btn-primary btn-sm">More details</a>
                     </div>
                 </div>
             </div>