diff --git a/source/_components/notify.telegram.markdown b/source/_components/notify.telegram.markdown
index e82e8485d4d..d6be5030a2d 100644
--- a/source/_components/notify.telegram.markdown
+++ b/source/_components/notify.telegram.markdown
@@ -121,6 +121,19 @@ Configuration variables:
 - **keyboard** (*Optional*): List of rows of commands, comma-separated, to make a custom keyboard.
 - **inline_keyboard** (*Optional*): List of rows of commands, comma-separated, to make a custom inline keyboard with buttons with associated callback data.
 
+<p class='note'>
+Since Homeassistant version 0.48 you have to [whitelist the source folder](/docs/configuration/basic/) of the file you want to include in the notification.
+
+```yaml
+configuration.yaml
+...
+homeassistant:
+  whitelist_external_dirs:
+    - /tmp
+    - /home/kenji/data
+```
+</p>
+
 
 ### {% linkable_title Document support %}