--- a/README.md	Fri Apr 27 16:32:53 2018 +0200
+++ b/README.md	Tue May 22 17:28:18 2018 +0300
@@ -19,7 +19,7 @@
 * # Ubuntu/Debian :
 sudo apt-get install build-essential bison flex autoconf
 sudo apt-get install python-wxgtk3.0 pyro mercurial
-sudo apt-get install python-nevow python-matplotlib python-lxml python-zeroconf
+sudo apt-get install python-nevow python-matplotlib python-lxml python-zeroconf python-cycler
 ```
 * Prepare
 ```