diff --git a/OFFENERBRIEF.md b/OFFENERBRIEF.md
index 18fb740..4c4eb12 100644
--- a/OFFENERBRIEF.md
+++ b/OFFENERBRIEF.md
@@ -1,6 +1,7 @@
 ---
 layout: page
 permalink: /
+image: vsh.jpg
 ---
 ![Außenansicht des Aquariums des Verschwörhaus](vsh.jpg) _Außenansicht des Aquariums des Verschwörhaus. CC BY, [Silvan Reiser](https://konkludenz.de)_
 
diff --git a/_config.yml b/_config.yml
index b3f123d..9781fae 100644
--- a/_config.yml
+++ b/_config.yml
@@ -39,6 +39,7 @@ sass:
 plugins:
  - jekyll-optional-front-matter # https://github.com/benbalter/jekyll-optional-front-matter
  - jekyll-titles-from-headings # https://github.com/benbalter/jekyll-titles-from-headings/
+ - jekyll-seo-tag
 
 titles_from_headings:
   enabled: true
diff --git a/_layouts/default.html b/_layouts/default.html
index 4abc6f2..63ef68a 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -7,6 +7,8 @@
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 
+{% seo title=false %}
+
 <title>
   {%- if title -%}{{ title }}
   {%- elsif page.title -%}{{ page.title }}
diff --git a/android-chrome-192x192.png b/android-chrome-192x192.png
new file mode 100644
index 0000000..81a8069
Binary files /dev/null and b/android-chrome-192x192.png differ
diff --git a/android-chrome-512x512.png b/android-chrome-512x512.png
new file mode 100644
index 0000000..6db904d
Binary files /dev/null and b/android-chrome-512x512.png differ
diff --git a/apple-touch-icon.png b/apple-touch-icon.png
new file mode 100644
index 0000000..7e933cd
Binary files /dev/null and b/apple-touch-icon.png differ
diff --git a/favicon-16x16.png b/favicon-16x16.png
new file mode 100644
index 0000000..e6485ed
Binary files /dev/null and b/favicon-16x16.png differ
diff --git a/favicon-32x32.png b/favicon-32x32.png
new file mode 100644
index 0000000..3fccb51
Binary files /dev/null and b/favicon-32x32.png differ
diff --git a/favicon.ico b/favicon.ico
new file mode 100644
index 0000000..0ee3ac1
Binary files /dev/null and b/favicon.ico differ
diff --git a/oinam-jekyll.gemspec b/oinam-jekyll.gemspec
index 337e3f7..9d41077 100644
--- a/oinam-jekyll.gemspec
+++ b/oinam-jekyll.gemspec
@@ -19,6 +19,7 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "kramdown-parser-gfm", "~> 1.1.0"
   spec.add_runtime_dependency "jekyll-optional-front-matter", "~> 0.3.2"
   spec.add_runtime_dependency "jekyll-titles-from-headings", "~> 0.5.3"
+  spec.add_runtime_dependency "jekyll-seo-tag"
 
   spec.add_development_dependency "bundler"
 end
diff --git a/site.webmanifest b/site.webmanifest
new file mode 100644
index 0000000..45dc8a2
--- /dev/null
+++ b/site.webmanifest
@@ -0,0 +1 @@
+{"name":"","short_name":"","icons":[{"src":"/android-chrome-192x192.png","sizes":"192x192","type":"image/png"},{"src":"/android-chrome-512x512.png","sizes":"512x512","type":"image/png"}],"theme_color":"#ffffff","background_color":"#ffffff","display":"standalone"}
\ No newline at end of file