diff --git a/source/_integrations/caldav.markdown b/source/_integrations/caldav.markdown
index c6d4f6e2027..048527e6352 100644
--- a/source/_integrations/caldav.markdown
+++ b/source/_integrations/caldav.markdown
@@ -17,12 +17,16 @@ The `caldav` platform allows you to connect to your WebDAV calendar and generate
 
 You need to have a CalDAV server and credentials for it. This integration was tested against [Baikal](http://sabre.io/baikal/) but any integration complying with the RFC4791 should work. [Nextcloud](https://nextcloud.com/) and [Owncloud](https://owncloud.org/) work fine.
 
+{% details "Notes for Home Assistant Core Installations" %}
+
 You might need some additional system packages to compile the Python CalDAV library. On a Debian based system, install them by:
 
 ```bash
 sudo apt-get install libxml2-dev libxslt1-dev zlib1g-dev
 ```
 
+{% enddetails %}
+
 ## Basic Setup
 
 To integrate a WebDAV calendar in Home Assistant, add the following section to your `configuration.yaml` file: