diff --git a/callbaker/functions.py b/callbaker/functions.py
index f0604db..73bcbb9 100644
--- a/callbaker/functions.py
+++ b/callbaker/functions.py
@@ -1,3 +1,8 @@
+"""
+This module contains all the necessary functions for
+creating callback data strings and parsing it from call's data.
+"""
+
 from callbaker import EMS, IMS, DMV