diff --git a/README.md b/README.md
index 7c2a611..b819417 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [Manuskript](http://www.theologeek.ch/manuskript) is an open-source
 tool for writers.
 
-Manuskript runs on on GNU/Linux, Mac OS X, and Windows.
+Manuskript runs on GNU/Linux, Mac OS X, and Windows.
 
 ![Main view](http://www.theologeek.ch/manuskript/wp-content/uploads/2017/11/manuskript-0.5.0-main-view.jpg)