diff --git a/README.md b/README.md
index 1700a41b578c0670d96c91674f21f3e342130dee..9d9f903c29f6ad9f4c9f4476bc653e2718b07caf 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@ Mini-workshop/tutorial on design of microfabrication layout masks
 ## Required software
 
 -  Layout editing software: [KLayout](https://www.klayout.de) preffered. [LayoutEditor](https://layouteditor.com) if you can afford the paid version
+
+## Optional software
 -  Text editor with syntax highlithing and whatever goodies you need for programming (e.g. [Atom](https://atom.io), Emacs, Vim,...)
 -  Python 3 + Pip + Packages
   -  Windows: Follow [these](https://phoenixnap.com/kb/how-to-install-python-3-windows) instructions up to step 5.