diff --git a/plugins/calendar/README b/plugins/calendar/README
index 238dd380..78c84a96 100644
--- a/plugins/calendar/README
+++ b/plugins/calendar/README
@@ -6,14 +6,10 @@ server as backends for calendar and event storage. For both drivers, some
 initialization of the local database is necessary. To do so, execute the
 SQL commands in drivers/<yourchoice>/SQL/<yourdatabase>.initial.sql
 
-The client-side calendar UI relies on the "fullcalendar" project by Adam Arshaw
-with extensions made for the use in Roundcube. All changes are published in
-an official fork at https://github.com/roundcube/fullcalendar
-
 For some general calendar-based operations such as alarms handling or iCal
-parsing/exporting this plugins requires the `libcalendaring` plugin which
-is also part of the Kolab Roundcube Plugins repository. Make sure that plugin
-is installed and configured correctly.
+parsing/exporting and UI widgets/style this plugins requires the `libcalendaring`
+and `libkolab` plugins which are also part of the Kolab Roundcube Plugins repository.
+Make sure these plugins are installed and configured correctly.
 
 For recurring event computation, some utility classes from the Horde project
 are used. They are packaged in a slightly modified version with this plugin.
@@ -27,7 +23,7 @@ library plugins. Thus in order to run the calendar plugin, you also need the
 following plugins installed:
 
 * libcalendaring [1]
-* libkolab [1] (when using the 'kolab' driver)
+* libkolab [1]
 
 
 INSTALLATION
@@ -44,6 +40,7 @@ driver.
   $ cd /<path-to-roundcube>/plugins
   $ cp -r /tmp/roundcubemail-plugins-kolab/plugins/calendar .
   $ cp -r /tmp/roundcubemail-plugins-kolab/plugins/libcalendaring .
+  $ cp -r /tmp/roundcubemail-plugins-kolab/plugins/libkolab .
 
 2. Create calendar plugin configuration
 
@@ -53,11 +50,15 @@ driver.
 
 3. Initialize the calendar database tables
 
-  $ mysql roundcubemail < drivers/database/SQL/mysql.initial.sql
-
-4. Enable the calendar plugin
-
   $ cd ../../
+  $ bin/initdb.sh --dir=plugins/calendar/drivers/database/SQL
+
+4. Build css styles for the Elastic skin
+
+  $ lessc --relative-urls -x plugins/libkolab/skins/elastic/libkolab.less > plugins/libkolab/skins/elastic/libkolab.min.css
+
+5. Enable the calendar plugin
+
   $ edit config/config.inc.php
 
 Add 'calendar' to the list of active plugins:
@@ -68,5 +69,4 @@ Add 'calendar' to the list of active plugins:
   );
 
 
-
 [1] https://git.kolab.org/diffusion/RPK/