diff --git a/packaging_apps_manifest.md b/packaging_apps_manifest.md
index e8c713af..d757bdba 100644
--- a/packaging_apps_manifest.md
+++ b/packaging_apps_manifest.md
@@ -53,9 +53,9 @@ The `manifest.json` file defines the app's constants, a bunch of values that Yun
 }
 ```
 
-* **name**: app name. It does not have to be unique, but it should be, since it is the name shown to all the YunoHost administrators in the app list.
+* **name**: app name. It does not have to be unique, but it should be, since it is the name shown to all the YunoHost administrators in the app list. Any characters are allowed.
 
-* **id**: ID of the app. You have to ensure that this ID is unique before submit an app integration request.
+* **id**: ID of the app. You have to ensure that this ID is unique before submit an app integration request. See [packaging_apps_guidelines.md#yep-11](https://github.com/YunoHost/doc/blob/master/packaging_apps_guidelines.md#yep-11) for valid rules.
 
 - **packaging_format**: package version. Actual version is **1**. This key has been set up to make independant packaging evolution versions from YunoHost versions evolution.