diff --git a/_includes/author-profile-custom-links.html b/_includes/author-profile-custom-links.html
index cf86521afb4e..b89ffcb7df6c 100644
--- a/_includes/author-profile-custom-links.html
+++ b/_includes/author-profile-custom-links.html
@@ -1,6 +1,6 @@
 <!--
   <li>
-    <a href="http://link-to-whatever-social-network.com/user/" itemprop="sameAs">
+    <a href="http://link-to-whatever-social-network.com/user/" itemprop="sameAs" rel="nofollow noopener noreferrer">
       <i class="fas fa-fw" aria-hidden="true"></i> Custom Social Profile Link
     </a>
   </li>
diff --git a/_includes/author-profile.html b/_includes/author-profile.html
index 1514f518cb31..51fb8f5e357a 100644
--- a/_includes/author-profile.html
+++ b/_includes/author-profile.html
@@ -75,7 +75,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.keybase %}
         <li>
-          <a href="https://keybase.io/{{ author.keybase }}" itemprop="sameAs">
+          <a href="https://keybase.io/{{ author.keybase }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fas fa-fw fa-key" aria-hidden="true"></i> Keybase
           </a>
         </li>
@@ -83,7 +83,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.twitter %}
         <li>
-          <a href="https://twitter.com/{{ author.twitter }}" itemprop="sameAs">
+          <a href="https://twitter.com/{{ author.twitter }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-twitter-square" aria-hidden="true"></i> Twitter
           </a>
         </li>
@@ -91,7 +91,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.facebook %}
         <li>
-          <a href="https://www.facebook.com/{{ author.facebook }}" itemprop="sameAs">
+          <a href="https://www.facebook.com/{{ author.facebook }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-facebook-square" aria-hidden="true"></i> Facebook
           </a>
         </li>
@@ -99,7 +99,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.google_plus %}
         <li>
-          <a href="https://plus.google.com/{{ author.google_plus }}" itemprop="sameAs">
+          <a href="https://plus.google.com/{{ author.google_plus }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-google-plus-square" aria-hidden="true"></i> Google+
           </a>
         </li>
@@ -107,7 +107,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.linkedin %}
         <li>
-          <a href="https://www.linkedin.com/in/{{ author.linkedin }}" itemprop="sameAs">
+          <a href="https://www.linkedin.com/in/{{ author.linkedin }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-linkedin" aria-hidden="true"></i> LinkedIn
           </a>
         </li>
@@ -115,7 +115,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.xing %}
         <li>
-          <a href="https://www.xing.com/profile/{{ author.xing }}" itemprop="sameAs">
+          <a href="https://www.xing.com/profile/{{ author.xing }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-xing-square" aria-hidden="true"></i> XING
           </a>
         </li>
@@ -123,7 +123,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.instagram %}
         <li>
-          <a href="https://instagram.com/{{ author.instagram }}" itemprop="sameAs">
+          <a href="https://instagram.com/{{ author.instagram }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-instagram" aria-hidden="true"></i> Instagram
           </a>
         </li>
@@ -131,7 +131,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.tumblr %}
         <li>
-          <a href="https://{{ author.tumblr }}.tumblr.com" itemprop="sameAs">
+          <a href="https://{{ author.tumblr }}.tumblr.com" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-tumblr-square" aria-hidden="true"></i> Tumblr
           </a>
         </li>
@@ -139,7 +139,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.bitbucket %}
         <li>
-          <a href="https://bitbucket.org/{{ author.bitbucket }}" itemprop="sameAs">
+          <a href="https://bitbucket.org/{{ author.bitbucket }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-bitbucket" aria-hidden="true"></i> Bitbucket
           </a>
         </li>
@@ -147,7 +147,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.github %}
         <li>
-          <a href="https://github.com/{{ author.github }}" itemprop="sameAs">
+          <a href="https://github.com/{{ author.github }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-github" aria-hidden="true"></i> GitHub
           </a>
         </li>
@@ -155,7 +155,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.gitlab %}
         <li>
-          <a href="https://gitlab.com/{{ author.gitlab }}" itemprop="sameAs">
+          <a href="https://gitlab.com/{{ author.gitlab }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-gitlab" aria-hidden="true"></i> GitLab
           </a>
         </li>
@@ -163,7 +163,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.stackoverflow %}
         <li>
-          <a href="https://www.stackoverflow.com/users/{{ author.stackoverflow }}" itemprop="sameAs">
+          <a href="https://www.stackoverflow.com/users/{{ author.stackoverflow }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-stack-overflow" aria-hidden="true"></i> Stack Overflow
           </a>
         </li>
@@ -171,7 +171,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.lastfm %}
         <li>
-          <a href="https://last.fm/user/{{ author.lastfm }}" itemprop="sameAs">
+          <a href="https://last.fm/user/{{ author.lastfm }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-lastfm-square" aria-hidden="true"></i> Last.fm
           </a>
         </li>
@@ -179,7 +179,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.dribbble %}
         <li>
-          <a href="https://dribbble.com/{{ author.dribbble }}" itemprop="sameAs">
+          <a href="https://dribbble.com/{{ author.dribbble }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-dribbble" aria-hidden="true"></i> Dribbble
           </a>
         </li>
@@ -187,7 +187,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.pinterest %}
         <li>
-          <a href="https://www.pinterest.com/{{ author.pinterest }}" itemprop="sameAs">
+          <a href="https://www.pinterest.com/{{ author.pinterest }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-pinterest" aria-hidden="true"></i> Pinterest
           </a>
         </li>
@@ -195,7 +195,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.foursquare %}
         <li>
-          <a href="https://foursquare.com/{{ author.foursquare }}" itemprop="sameAs">
+          <a href="https://foursquare.com/{{ author.foursquare }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-foursquare" aria-hidden="true"></i> Foursquare
           </a>
         </li>
@@ -203,7 +203,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.steam %}
         <li>
-          <a href="https://steamcommunity.com/id/{{ author.steam }}" itemprop="sameAs">
+          <a href="https://steamcommunity.com/id/{{ author.steam }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-steam" aria-hidden="true"></i> Steam
           </a>
         </li>
@@ -212,13 +212,13 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
       {% if author.youtube %}
         {% if author.youtube contains "://" %}
           <li>
-            <a href="{{ author.youtube }}" itemprop="sameAs">
+            <a href="{{ author.youtube }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
               <i class="fab fa-fw fa-youtube" aria-hidden="true"></i> YouTube
             </a>
           </li>
         {% else author.youtube %}
           <li>
-            <a href="https://www.youtube.com/user/{{ author.youtube }}" itemprop="sameAs">
+            <a href="https://www.youtube.com/user/{{ author.youtube }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
               <i class="fab fa-fw fa-youtube" aria-hidden="true"></i> YouTube
             </a>
           </li>
@@ -227,7 +227,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.soundcloud %}
         <li>
-          <a href="https://soundcloud.com/{{ author.soundcloud }}" itemprop="sameAs">
+          <a href="https://soundcloud.com/{{ author.soundcloud }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-soundcloud" aria-hidden="true"></i> SoundCloud
           </a>
         </li>
@@ -235,7 +235,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.weibo %}
         <li>
-          <a href="https://www.weibo.com/{{ author.weibo }}" itemprop="sameAs">
+          <a href="https://www.weibo.com/{{ author.weibo }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-weibo" aria-hidden="true"></i> Weibo
           </a>
         </li>
@@ -243,7 +243,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.flickr %}
         <li>
-          <a href="https://www.flickr.com/{{ author.flickr }}" itemprop="sameAs">
+          <a href="https://www.flickr.com/{{ author.flickr }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-flickr" aria-hidden="true"></i> Flickr
           </a>
         </li>
@@ -251,7 +251,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.codepen %}
         <li>
-          <a href="https://codepen.io/{{ author.codepen }}" itemprop="sameAs">
+          <a href="https://codepen.io/{{ author.codepen }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-codepen" aria-hidden="true"></i> CodePen
           </a>
         </li>
@@ -259,7 +259,7 @@ <h3 class="author__name" itemprop="name">{{ author.name }}</h3>
 
       {% if author.vine %}
         <li>
-          <a href="https://vine.co/u/{{ author.vine }}" itemprop="sameAs">
+          <a href="https://vine.co/u/{{ author.vine }}" itemprop="sameAs" rel="nofollow noopener noreferrer">
             <i class="fab fa-fw fa-vine" aria-hidden="true"></i> Vine
           </a>
         </li>
diff --git a/_includes/footer.html b/_includes/footer.html
index b59ff4ed026a..2bc78963ce39 100644
--- a/_includes/footer.html
+++ b/_includes/footer.html
@@ -7,7 +7,7 @@
     {% if site.footer.links %}
       {% for link in site.footer.links %}
         {% if link.label and link.url %}
-          <li><a href="{{ link.url }}"><i class="{{ link.icon | default: 'fas fa-link' }}" aria-hidden="true"></i> {{ link.label }}</a></li>
+          <li><a href="{{ link.url }}" rel="nofollow noopener noreferrer"><i class="{{ link.icon | default: 'fas fa-link' }}" aria-hidden="true"></i> {{ link.label }}</a></li>
         {% endif %}
       {% endfor %}
     {% endif %}