diff --git a/danmaku2ass.py b/danmaku2ass.py
index 1a14395..0f00c9f 100755
--- a/danmaku2ass.py
+++ b/danmaku2ass.py
@@ -1,5 +1,12 @@
 #!/usr/bin/env python3
 
+# The original author of this program, Danmaku2ASS, is StarBrilliant.
+# This file is released under General Public License version 3.
+# You should have received a copy of General Public License text alongside with
+# this program. If not, you can obtain it at http://gnu.org/copyleft/gpl.html .
+# This program comes with no warranty, the author will not be resopnsible for
+# any damage or problems caused by this program.
+
 import argparse
 import calendar
 import gettext