diff --git a/client/index.html b/client/index.html
index f70743a..7d2dfc5 100644
--- a/client/index.html
+++ b/client/index.html
@@ -122,17 +122,17 @@
             <h1>Snapdrop</h1>
             <div class="font-subheading">The easiest way to transfer files across devices.</div>
             <div class="row">
-                <a class="icon-button" target="_blank" href="https://github.com/RobinLinus/snapdrop" title="Snapdrop on Github">
+                <a class="icon-button" target="_blank" href="https://github.com/RobinLinus/snapdrop" title="Snapdrop on Github" rel="noreferrer">
                     <svg class="icon">
                         <use xlink:href="#github" />
                     </svg>
                 </a>
-                <a class="icon-button" target="_blank" href="https://twitter.com/intent/tweet?text=https://snapdrop.net%20by%20@robin_linus%20&" title="Tweet about Snapdrop">
+                <a class="icon-button" target="_blank" href="https://twitter.com/intent/tweet?text=https://snapdrop.net%20by%20@robin_linus%20&" title="Tweet about Snapdrop" rel="noreferrer">
                     <svg class="icon">
                         <use xlink:href="#twitter" />
                     </svg>
                 </a>
-                <a class="icon-button" target="_blank" href="https://github.com/RobinLinus/snapdrop#frequently-asked-questions" title="Frequently asked questions">
+                <a class="icon-button" target="_blank" href="https://github.com/RobinLinus/snapdrop#frequently-asked-questions" title="Frequently asked questions" rel="noreferrer">
                     <svg class="icon">
                         <use xlink:href="#help-outline" />
                     </svg>