diff --git a/pytchat/__init__.py b/pytchat/__init__.py
index e36731d..54e5cd2 100644
--- a/pytchat/__init__.py
+++ b/pytchat/__init__.py
@@ -1,8 +1,8 @@
 """
 pytchat is a lightweight python library to browse youtube livechat without Selenium or BeautifulSoup.
 """
-__copyright__    = 'Copyright (C) 2019, 2020 taizan-hokuto'
-__version__      = '0.5.4'
+__copyright__    = 'Copyright (C) 2019, 2020, 2021 taizan-hokuto'
+__version__      = '0.5.5'
 __license__      = 'MIT'
 __author__       = 'taizan-hokuto'
 __author_email__ = '55448286+taizan-hokuto@users.noreply.github.com'
diff --git a/setup.py b/setup.py
index 07744af..5fe7008 100644
--- a/setup.py
+++ b/setup.py
@@ -50,8 +50,9 @@ setup(
         'Natural Language :: Japanese',
         'Development Status :: 4 - Beta',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 3.7',        
-        'Programming Language :: Python :: 3.8',        
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',       
         'License :: OSI Approved :: MIT License',
     ],
     description="a python library for fetching youtube live chat.",