diff --git a/pytchat/processors/html_archiver.py b/pytchat/processors/html_archiver.py
index 95ada14..e33d2fc 100644
--- a/pytchat/processors/html_archiver.py
+++ b/pytchat/processors/html_archiver.py
@@ -3,7 +3,6 @@ import os
 import re
 import time
 from base64 import standard_b64encode
-from httpx import NetworkError, ReadTimeout
 from .chat_processor import ChatProcessor
 from .default.processor import DefaultProcessor
 from ..exceptions import UnknownConnectionError
@@ -48,6 +47,7 @@ class HTMLArchiver(ChatProcessor):
     '''
     def __init__(self, save_path, callback=None):
         super().__init__()
+        self.client = httpx.Client(http2=True)
         self.save_path = self._checkpath(save_path)
         self.processor = DefaultProcessor()
         self.emoji_table = {}  # tuble for custom emojis. key: emoji_id, value: base64 encoded image binary.
@@ -118,9 +118,9 @@ class HTMLArchiver(ChatProcessor):
         err = None
         for _ in range(5):
             try:
-                resp = httpx.get(url, timeout=30)
+                resp = self.client.get(url, timeout=30)
                 break
-            except (NetworkError, ReadTimeout) as e:
+            except httpx.HTTPError as e:
                 print("Network Error. retrying...")
                 err = e
                 time.sleep(3)
diff --git a/pytchat/tool/videoinfo.py b/pytchat/tool/videoinfo.py
index 8e789b6..19baa78 100644
--- a/pytchat/tool/videoinfo.py
+++ b/pytchat/tool/videoinfo.py
@@ -82,6 +82,7 @@ class VideoInfo:
 
     def __init__(self, video_id):
         self.video_id = extract_video_id(video_id)
+        self.client = httpx.Client(http2=True)
         err = None
         for _ in range(3):
             try:
@@ -103,7 +104,7 @@ class VideoInfo:
         err = None
         for _ in range(3):
             try:
-                resp = httpx.get(url, headers=headers)
+                resp = self.client.get(url, headers=headers)
                 resp.raise_for_status()
                 break
             except httpx.HTTPError as e:
diff --git a/tests/test_videoinfo.py b/tests/test_videoinfo.py
index c2a8803..c60abbc 100644
--- a/tests/test_videoinfo.py
+++ b/tests/test_videoinfo.py
@@ -13,7 +13,7 @@ def _set_test_data(filepath, mocker):
     response_mock = mocker.Mock()
     response_mock.status_code = 200
     response_mock.text = _text
-    mocker.patch('httpx.get').return_value = response_mock
+    mocker.patch('httpx.Client.get').return_value = response_mock
 
 
 def test_archived_page(mocker):