diff --git a/doc/gatt-api.txt b/doc/gatt-api.txt
index 0f1cc90..2a8da75 100644
--- a/doc/gatt-api.txt
+++ b/doc/gatt-api.txt
Possible options: "offset": Start offset
"device": Device path (Server only)
"link": Link type (Server only)
+ "prepare-authorize": boolean Is prepare
+ authorization
+ request
Possible Errors: org.bluez.Error.Failed
org.bluez.Error.InProgress
"encrypt-authenticated-write"
"secure-read" (Server only)
"secure-write" (Server only)
+ "authorize"
Characteristic Descriptors hierarchy
====================================
Possible options: "offset": Start offset
"device": Device path (Server only)
"link": Link type (Server only)
+ "prepare-authorize": boolean Is prepare
+ authorization
+ request
Possible Errors: org.bluez.Error.Failed
org.bluez.Error.InProgress
"encrypt-authenticated-write"
"secure-read" (Server Only)
"secure-write" (Server Only)
+ "authorize"
GATT Profile hierarchy
=====================