diff --git a/_config.yml b/_config.yml
index 52c02f1..2d0ca0e 100644
--- a/_config.yml
+++ b/_config.yml
@@ -25,12 +25,6 @@ description: >- # used by seo meta and the atom feed
 # e.g. 'https://username.github.io', note that it does not end with a '/'.
 url: "https://www.cscherr.de"
 
-github:
-  username: PlexSheep # change to your github username
-
-# twitter:
-#   username: twitter_username # change to your twitter username
-
 social:
   # Change to your full name.
   # It will be displayed as the default author of the posts and the copyright owner in the Footer
@@ -91,7 +85,7 @@ theme_mode: # [light | dark]
 img_cdn:
 
 # the avatar on sidebar, support local or CORS resources
-avatar:
+avatar: https://static.cscherr.de/images/profile/profile.svg
 
 # The URL of the site-wide social preview image used in SEO `og:image` meta tag.
 # It can be overridden by a customized `page.image` in front matter.
diff --git a/_data/authors.yml b/_data/authors.yml
index f012012..b60f73e 100644
--- a/_data/authors.yml
+++ b/_data/authors.yml
@@ -15,3 +15,7 @@ sille_bille:
   name: Dinesh Prasanth Moluguwan Krishnamoorthy
   twitter: dinesh_MKD
   url: https://github.com/SilleBille/
+
+cscherr:
+  name: Christoph Johannes Scherr
+  url: https://www.cscherr.de
diff --git a/_data/contact.yml b/_data/contact.yml
index 1ed228a..6a5d8eb 100644
--- a/_data/contact.yml
+++ b/_data/contact.yml
@@ -2,9 +2,15 @@
 
 - type: github
   icon: "fab fa-github"
+  username: PlexSheep
 
-- type: twitter
-  icon: "fa-brands fa-x-twitter"
+- type: mastodon
+  icon: "fa-brands fa-mastodon"
+  url: https://infosec.exchange/@plexsheep
+
+- type: lemmy
+  icon-url: "https://infosec.pub/static/1787a778/assets/icons/favicon.svg"
+  url: https://infosec.pub/u/PlexSheep
 
 - type: email
   icon: "fas fa-envelope"
@@ -13,6 +19,7 @@
 - type: rss
   icon: "fas fa-rss"
   noblank: true
+
 # Uncomment and complete the url below to enable more contact options
 #
 # - type: mastodon
diff --git a/_data/share.yml b/_data/share.yml
index d572e6d..590add7 100644
--- a/_data/share.yml
+++ b/_data/share.yml
@@ -2,18 +2,25 @@
 #  Icons from <https://fontawesome.com/>
 
 platforms:
-  - type: Twitter
-    icon: "fa-brands fa-square-x-twitter"
-    link: "https://twitter.com/intent/tweet?text=TITLE&url=URL"
-
-  - type: Facebook
-    icon: "fab fa-facebook-square"
-    link: "https://www.facebook.com/sharer/sharer.php?title=TITLE&u=URL"
-
   - type: Telegram
     icon: "fab fa-telegram"
     link: "https://t.me/share/url?url=URL&text=TITLE"
 
+  - type: Mastodon
+    icon: "fa-brands fa-mastodon"
+    # See: https://github.com/justinribeiro/share-to-mastodon#properties
+    instances:
+      - label: mastodon.social
+        link: "https://mastodon.social/"
+      - label: mastodon.online
+        link: "https://mastodon.online/"
+      - label: fosstodon.org
+        link: "https://fosstodon.org/"
+      - label: photog.social
+        link: "https://photog.social/"
+      - label: infosec.exchange
+        link: "https://infosec.exchange/"
+
   # Uncomment below if you need to.
   #
   # - type: Linkedin
diff --git a/_includes/sidebar.html b/_includes/sidebar.html
index b8f92e3..aa16dd3 100644
--- a/_includes/sidebar.html
+++ b/_includes/sidebar.html
@@ -89,7 +89,11 @@
             rel="{{ link_types }}"
           {% endunless %}
         >
+        {% if entry.icon-url %}
+          <img src="{{ entry.icon-url }}" alt="icon"></img>
+        {% else %}
           <i class="{{ entry.icon }}"></i>
+        {% endif %}
         </a>
       {% endif %}
     {% endfor %}