diff --git a/pytchat/__init__.py b/pytchat/__init__.py
index dad8ba9..d24aa4c 100644
--- a/pytchat/__init__.py
+++ b/pytchat/__init__.py
@@ -2,7 +2,7 @@
 pytchat is a lightweight python library to browse youtube livechat without Selenium or BeautifulSoup.
 """
 __copyright__    = 'Copyright (C) 2019, 2020 taizan-hokuto'
-__version__      = '0.4.2'
+__version__      = '0.4.3'
 __license__      = 'MIT'
 __author__       = 'taizan-hokuto'
 __author_email__ = '55448286+taizan-hokuto@users.noreply.github.com'
diff --git a/requirements.txt b/requirements.txt
index 4d24516..28c33c7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-httpx[http2]==0.14.1
-protobuf==3.13.0
+httpx[http2]==0.16.1
+protobuf==3.14.0
 pytz
 urllib3
\ No newline at end of file
diff --git a/requirements_test.txt b/requirements_test.txt
index f70a1aa..2a6ca06 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,4 +1,2 @@
-mock
-mocker
-pytest
-pytest_httpx
+pytest-mock==3.3.1
+pytest-httpx==0.10.0