diff --git a/_layouts/default.html b/_layouts/default.html
index e5e87c0..8707339 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -43,7 +43,7 @@
         <meta name="twitter:image" content="{{ site.url }}{{ site.baseurl }}{{ page.image }}">
         {% else %}
         <meta name="twitter:card"  content="summary">
-        <meta name="twitter:image" content="{{ site.title_image }}">
+        <meta name="twitter:image" content="{{ site.url }}/assets/img/vac.png">
         {% endif %}
         <!-- end of Twitter cards -->
 
diff --git a/_posts/2019-08-02-vac-overview.md b/_posts/2019-08-02-vac-overview.md
index 5442b46..6b74d5e 100644
--- a/_posts/2019-08-02-vac-overview.md
+++ b/_posts/2019-08-02-vac-overview.md
@@ -8,7 +8,6 @@ published: true
 permalink: /vac-overview
 categories: research
 summary: Vac is a modular peer-to-peer messaging stack, with a focus on secure messaging. Overview of terms, stack and open problems.
-image: /assets/img/vac.png
 ---
 
 Vac is a **modular peer-to-peer messaging stack, with a focus on secure messaging**. What does that mean? Let's unpack it a bit.
diff --git a/_posts/2020-02-7-dns-based-discovery.md b/_posts/2020-02-7-dns-based-discovery.md
index 7bbf7ef..74d6af1 100644
--- a/_posts/2020-02-7-dns-based-discovery.md
+++ b/_posts/2020-02-7-dns-based-discovery.md
@@ -8,7 +8,6 @@ published: true
 permalink: /dns-based-discovery
 categories: research
 summary: A look at EIP-1459 and the benefits of DNS based discovery.
-image: /assets/img/vac.png
 ---
 
 Discovery in p2p networks is the process of how nodes find each other and specific resources they are looking for. Popular discovery protocols, such as [Kademlia](https://pdos.csail.mit.edu/~petar/papers/maymounkov-kademlia-lncs.pdf) which utilizes a [distributed hash table](https://en.wikipedia.org/wiki/Distributed_hash_table) or DHT, are highly inefficient for resource restricted devices. These methods use short connection windows, and it is quite battery intensive to keep establishing connections. Additionally, we cannot expect a mobile phone for example to synchronize an entire DHT using cellular data.