diff --git a/_layouts/default.html b/_layouts/default.html
index 3f71997..2edc2c4 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -5,6 +5,7 @@
     <meta name="theme-color" content="#678b22" />
     <meta http-equiv="X-UA-Compatible" content="chrome=1" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="flattr:id" content="8wlw3v">
 
     <link rel="stylesheet" type="text/css" href="{{ site.url }}/css/layout-bright.css" media="screen" />
     <link rel="stylesheet" type="text/css" href="{{ site.url }}/css/pygment_trac.css" media="screen" />
diff --git a/_layouts/default_nobreaktables.html b/_layouts/default_nobreaktables.html
index fcb1578..ac7a289 100644
--- a/_layouts/default_nobreaktables.html
+++ b/_layouts/default_nobreaktables.html
@@ -5,6 +5,7 @@
     <meta name="theme-color" content="#678b22" />
     <meta http-equiv="X-UA-Compatible" content="chrome=1" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="flattr:id" content="8wlw3v">
 
     <link rel="stylesheet" type="text/css" href="{{ site.url }}/css/layout-bright.css" media="screen" />
     <link rel="stylesheet" type="text/css" href="{{ site.url }}/css/pygment_trac.css" media="screen" />