diff --git a/py7zr/__init__.py b/py7zr/__init__.py
index 7882ea21..a0bbe207 100644
--- a/py7zr/__init__.py
+++ b/py7zr/__init__.py
@@ -24,6 +24,8 @@
 from py7zr.py7zr import (ArchiveInfo, FileInfo, SevenZipFile, is_7zfile,
                          unpack_7zarchive)
 
+__copyright__ = 'Copyright (C) 2019 Hiroshi Miura'
+
 try:
     __version__ = get_distribution(__name__).version
 except DistributionNotFound: