diff --git a/_config.yml b/_config.yml
index 5b7814d..918efe2 100644
--- a/_config.yml
+++ b/_config.yml
@@ -20,6 +20,7 @@
 
 title: ReclaimFutures
 email: info@reclaimfutures.org
+twitter: "@reclaim_futures"
 description: >- # this means to ignore newlines until "baseurl:"
   ReclaimFutures is a technology and culture conference exploring post-capitalist desire, utopian horizons, alternative computing and ecology..
 baseurl: "" # the subpath of your site, e.g. /blog
diff --git a/_includes/common/head.html b/_includes/common/head.html
index 483c80e..ff0cd0a 100644
--- a/_includes/common/head.html
+++ b/_includes/common/head.html
@@ -25,24 +25,28 @@
     <meta name="theme-color" content="#0ddfe7">
     <meta content="{{ site.title }}" property="og:site_name" />
 
+    <meta name="twitter:card" content="summary" />
+    <meta name="twitter:site" content="{{ site.twitter }}" />
+    <meta name="twitter:title" content="{{ site.title }}" />
+    <meta name="twitter:description" content="{{ site.description }}" />
+    <meta name="twitter:image" content="https://reclaimfutures.org/assets/img/TwitterCard.png" />
 
+    <meta property="og:title" content="{{ title }}" />
+    <meta property="og:description" content="{{ page.excerpt | default: site.description | strip_html | normalize_whitespace | truncate: 160 | escape }}" />
+    <meta property="article:published_time" content="{{page.date}}" />
 
-        <meta property="og:title" content="{{ title }}" />
-        <meta property="og:description" content="{{ page.excerpt | default: site.description | strip_html | normalize_whitespace | truncate: 160 | escape }}" />
-        <meta property="article:published_time" content="{{page.date}}" />
+    <!-- page.modified isn't a natural Jekyll property, but it can be added. -->
+    {% if page.modified %}
+        <meta property="article:modified_time" content="{{page.modified}}" />
+    {% endif %}
 
-        <!-- page.modified isn't a natural Jekyll property, but it can be added. -->
-        {% if page.modified %}
-            <meta property="article:modified_time" content="{{page.modified}}" />
-        {% endif %}
+    <meta property="article:author" content="{{ page.author }}" />
+    <meta property="article:publisher" content="{{ page.author }}" />
 
-        <meta property="article:author" content="{{ page.author }}" />
-        <meta property="article:publisher" content="{{ page.author }}" />
-
-        <!-- I use the page.categories property for OG tags. -->
-        {% for tag in page.categories %}
-            <meta property="article:tag" content="{{tag}}" />
-        {% endfor %}
+    <!-- I use the page.categories property for OG tags. -->
+    {% for tag in page.categories %}
+        <meta property="article:tag" content="{{tag}}" />
+    {% endfor %}
 
 
 
diff --git a/_includes/text/fr/how-to-participate.md b/_includes/text/fr/how-to-participate.md
index 14f6d51..56d67c8 100644
--- a/_includes/text/fr/how-to-participate.md
+++ b/_includes/text/fr/how-to-participate.md
@@ -9,7 +9,7 @@ Pour soumettre une proposition :
 - Envoyez le à [info@reclaimfutures.org](mailto:info@reclaimfutures.org). avec comme sujet  'RF2020 Proposal - [ titre ]'
 - C'est tout bon ! Nous vous recontacterons peu après la date limite d'envoi.
 
-Si vous souhaitez crypter une communication par courrier électronique, notre clé publique se trouve là.
+Si vous souhaitez crypter une communication par courrier électronique, notre clé publique se trouve [là](/publickey.asc).
 
 ### Soumettre à notre instance Gitea
 
diff --git a/assets/img/TwitterCard.png b/assets/img/TwitterCard.png
new file mode 100644
index 0000000..bd16730
Binary files /dev/null and b/assets/img/TwitterCard.png differ