diff --git a/README.md b/README.md
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+++ b/README.md
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 OctoPrint
 =========
 
+[![Flattr this git repo](http://api.flattr.com/button/flattr-badge-large.png)](https://flattr.com/submit/auto?user_id=foosel&url=https://github.com/foosel/OctoPrint&title=OctoPrint&language=&tags=github&category=software)
+
 OctoPrint provides a responsive web interface for controlling a 3D printer (RepRap, Ultimaker, ...). It currently
 allows