diff --git a/app/templates/community/community.html b/app/templates/community/community.html
index 475231ab..ae476993 100644
--- a/app/templates/community/community.html
+++ b/app/templates/community/community.html
@@ -95,11 +95,11 @@
                     </div>
                     <div class="col-6">
                         {% if current_user.is_authenticated and community_membership(current_user, community) in [SUBSCRIPTION_MEMBER, SUBSCRIPTION_MODERATOR, SUBSCRIPTION_OWNER] %}
-                            <a class="w-100 btn btn-primary" href="/community/{{ community.link() }}/unsubscribe">{{ _('Leave') }}</a>
+                            <a class="w-100 btn btn-primary" href="/community/{{ community.link() }}/unsubscribe" rel="nofollow">{{ _('Leave') }}</a>
                         {% elif current_user.is_authenticated and community_membership(current_user, community) == SUBSCRIPTION_PENDING %}
-                            <a class="w-100 btn btn-outline-secondary" href="/community/{{ community.link() }}/unsubscribe">{{ _('Pending') }}</a>
+                            <a class="w-100 btn btn-outline-secondary" href="/community/{{ community.link() }}/unsubscribe" rel="nofollow">{{ _('Pending') }}</a>
                         {% else %}
-                            <a class="w-100 btn btn-primary" href="/community/{{ community.link() }}/subscribe">{{ _('Join') }}</a>
+                            <a class="w-100 btn btn-primary" href="/community/{{ community.link() }}/subscribe" rel="nofollow">{{ _('Join') }}</a>
                         {% endif %}
                     </div>
                 </div>
diff --git a/app/templates/list_communities.html b/app/templates/list_communities.html
index ea4d5ab5..f1ca7c9d 100644
--- a/app/templates/list_communities.html
+++ b/app/templates/list_communities.html
@@ -72,14 +72,14 @@
                     <tr class="">
                         <td width="70">{% if current_user.is_authenticated %}
                                 {% if community_membership(current_user, community) in [SUBSCRIPTION_MEMBER, SUBSCRIPTION_MODERATOR, SUBSCRIPTION_OWNER] %}
-                                    <a class="btn btn-primary btn-sm" href="/community/{{ community.link() }}/unsubscribe">{{ _('Leave') }}</a>
+                                    <a class="btn btn-primary btn-sm" href="/community/{{ community.link() }}/unsubscribe" rel="nofollow">{{ _('Leave') }}</a>
                                 {% elif community_membership(current_user, community) == SUBSCRIPTION_PENDING %}
-                                    <a class="btn btn-outline-secondary btn-sm" href="/community/{{ community.link() }}/unsubscribe">{{ _('Pending') }}</a>
+                                    <a class="btn btn-outline-secondary btn-sm" href="/community/{{ community.link() }}/unsubscribe" rel="nofollow">{{ _('Pending') }}</a>
                                 {% else %}
-                                    <a class="btn btn-primary btn-sm" href="/community/{{ community.link() }}/subscribe">{{ _('Join') }}</a>
+                                    <a class="btn btn-primary btn-sm" href="/community/{{ community.link() }}/subscribe" rel="nofollow">{{ _('Join') }}</a>
                                 {% endif %}
                             {% else %}
-                                <a class="btn btn-primary btn-sm" href="/community/{{ community.link() }}/subscribe">{{ _('Join') }}</a>
+                                <a class="btn btn-primary btn-sm" href="/community/{{ community.link() }}/subscribe" rel="nofollow">{{ _('Join') }}</a>
                             {% endif %}</td>
                         {% if not low_bandwidth %}
                             <td width="46">
diff --git a/app/templates/post/add_reply.html b/app/templates/post/add_reply.html
index 6fbabbac..579b269e 100644
--- a/app/templates/post/add_reply.html
+++ b/app/templates/post/add_reply.html
@@ -37,9 +37,9 @@
                 <div class="row">
                     <div class="col-6">
                         {% if current_user.is_authenticated and community_membership(current_user, post.community) %}
-                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/unsubscribe">{{ _('Leave') }}</a>
+                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/unsubscribe" rel="nofollow">{{ _('Leave') }}</a>
                         {% else %}
-                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/subscribe">{{ _('Join') }}</a>
+                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/subscribe" rel="nofollow">{{ _('Join') }}</a>
                         {% endif %}
                     </div>
                     <div class="col-6">
diff --git a/app/templates/post/continue_discussion.html b/app/templates/post/continue_discussion.html
index eb947b30..39af0ece 100644
--- a/app/templates/post/continue_discussion.html
+++ b/app/templates/post/continue_discussion.html
@@ -64,9 +64,9 @@
                 <div class="row">
                     <div class="col-6">
                         {% if current_user.is_authenticated and community_membership(current_user, post.community) %}
-                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/unsubscribe">{{ _('Leave') }}</a>
+                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/unsubscribe" rel="nofollow">{{ _('Leave') }}</a>
                         {% else %}
-                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/subscribe">{{ _('Join') }}</a>
+                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/subscribe" rel="nofollow">{{ _('Join') }}</a>
                         {% endif %}
                     </div>
                     <div class="col-6">
diff --git a/app/templates/post/post.html b/app/templates/post/post.html
index d92ba4db..1c7cbd3a 100644
--- a/app/templates/post/post.html
+++ b/app/templates/post/post.html
@@ -160,9 +160,9 @@
                     </div>
                     <div class="col-6">
                         {% if current_user.is_authenticated and community_membership(current_user, post.community) >= SUBSCRIPTION_MEMBER %}
-                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/unsubscribe">{{ _('Leave') }}</a>
+                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/unsubscribe" rel="nofollow">{{ _('Leave') }}</a>
                         {% else %}
-                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/subscribe">{{ _('Join') }}</a>
+                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/subscribe" rel="nofollow">{{ _('Join') }}</a>
                         {% endif %}
                     </div>
                 </div>
diff --git a/app/templates/post/post_reply_edit.html b/app/templates/post/post_reply_edit.html
index d5126e83..d33ed6e5 100644
--- a/app/templates/post/post_reply_edit.html
+++ b/app/templates/post/post_reply_edit.html
@@ -37,9 +37,9 @@
                 <div class="row">
                     <div class="col-6">
                         {% if current_user.is_authenticated and community_membership(current_user, post.community) %}
-                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/unsubscribe">{{ _('Unsubscribe') }}</a>
+                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/unsubscribe" rel="nofollow">{{ _('Unsubscribe') }}</a>
                         {% else %}
-                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/subscribe">{{ _('Subscribe') }}</a>
+                            <a class="w-100 btn btn-primary" href="/community/{{ post.community.link() }}/subscribe" rel="nofollow">{{ _('Subscribe') }}</a>
                         {% endif %}
                     </div>
                     <div class="col-6">