diff --git a/proxy/__init__.py b/proxy/__init__.py
index 9d1ce4d..135c42c 100644
--- a/proxy/__init__.py
+++ b/proxy/__init__.py
@@ -1,6 +1,6 @@
 from .config import parse_dc_ip_list, proxy_config
-from .utils import get_link_host
+from .utils import get_link_host, build_github_opener
 
-__version__ = "1.6.6"
+__version__ = "1.6.5"
 
-__all__ = ["__version__", "get_link_host", "proxy_config", "parse_dc_ip_list"]
\ No newline at end of file
+__all__ = ["__version__", "get_link_host", "proxy_config", "parse_dc_ip_list", "build_github_opener"]
\ No newline at end of file
diff --git a/proxy/config.py b/proxy/config.py
index b59259d..8c2a32f 100644
--- a/proxy/config.py
+++ b/proxy/config.py
@@ -7,9 +7,10 @@ import threading
 
 from dataclasses import dataclass, field
 from typing import Dict, List
-from urllib.request import Request, urlopen
+from urllib.request import Request
 
 from .balancer import balancer
+from .utils import build_github_opener
 
 log = logging.getLogger('tg-mtproto-proxy')
 
@@ -70,7 +71,7 @@ def _fetch_cfproxy_domain_list() -> List[str]:
     try:
         req = Request(CFPROXY_DOMAINS_URL + "?" + "".join(random.choices(string.ascii_letters, k=7)),
                        headers={'User-Agent': 'tg-ws-proxy'})
-        with urlopen(req, timeout=10) as resp:
+        with build_github_opener().open(req, timeout=10) as resp:
             text = resp.read().decode('utf-8', errors='replace')
         encoded = [
             line.strip() for line in text.splitlines()
diff --git a/proxy/utils.py b/proxy/utils.py
index 3b51aa6..c0f5980 100644
--- a/proxy/utils.py
+++ b/proxy/utils.py
@@ -1,6 +1,9 @@
 import socket as _socket
+import urllib.request
+import http.client
 
-from typing import Optional
+from typing import Optional, Dict
+from urllib.request import Request
 
 
 ZERO_64 = b'\x00' * 64
@@ -26,6 +29,11 @@ RESERVED_STARTS = {b'\x48\x45\x41\x44', b'\x50\x4F\x53\x54',
                     b'\xdd\xdd\xdd\xdd', b'\x16\x03\x01\x02'}
 RESERVED_CONTINUE = b'\x00\x00\x00\x00'
 
+_GITHUB_IPS: Dict[str, str] = {
+    "release-assets.githubusercontent.com": "185.199.109.133",
+    "raw.githubusercontent.com": "185.199.109.133",
+}
+
 
 def human_bytes(n: int) -> str:
     for unit in ('B', 'KB', 'MB', 'GB'):
@@ -45,4 +53,32 @@ def get_link_host(host: str) -> Optional[str]:
             link_host = '127.0.0.1'
         return link_host
     else:
-        return host
\ No newline at end of file
+        return host
+
+
+class _PinnedHTTPSHandler(urllib.request.HTTPSHandler):
+    def https_open(self, req: Request):
+        host = req.host.split(":")[0]
+        ip = _GITHUB_IPS.get(host)
+        if not ip:
+            return super().https_open(req)
+        pinned = ip
+
+        class _Conn(http.client.HTTPSConnection):
+            def connect(self):
+                self.sock = _socket.create_connection(
+                    (pinned, self.port or 443),
+                    self.timeout,
+                    self.source_address,
+                )
+                if self._tunnel_host:
+                    self._tunnel()
+                self.sock = self._context.wrap_socket(
+                    self.sock, server_hostname=self._tunnel_host or self.host
+                )
+
+        return self.do_open(_Conn, req)
+
+
+def build_github_opener() -> urllib.request.OpenerDirector:
+    return urllib.request.build_opener(_PinnedHTTPSHandler())
\ No newline at end of file
diff --git a/utils/update_check.py b/utils/update_check.py
index 97f8062..f73f711 100644
--- a/utils/update_check.py
+++ b/utils/update_check.py
@@ -14,7 +14,8 @@ from itertools import zip_longest
 from pathlib import Path
 from typing import Any, Dict, Optional, Tuple
 from urllib.error import HTTPError, URLError
-from urllib.request import Request, urlopen
+from urllib.request import Request
+from proxy.utils import build_github_opener
 
 REPO = "Flowseal/tg-ws-proxy"
 RELEASES_LATEST_API = f"https://api.github.com/repos/{REPO}/releases/latest"
@@ -135,7 +136,7 @@ def fetch_latest_release(
         method="GET",
     )
     try:
-        with urlopen(req, timeout=timeout) as resp:
+        with build_github_opener().open(req, timeout=timeout) as resp:
             code = getattr(resp, "status", None) or resp.getcode()
             new_etag = resp.headers.get("ETag")
             raw = resp.read().decode("utf-8", errors="replace")
diff --git a/windows.py b/windows.py
index 4ccc843..947b6f0 100644
--- a/windows.py
+++ b/windows.py
@@ -8,8 +8,11 @@ import threading
 import time
 import webbrowser
 import winreg
+import tempfile
+
 from pathlib import Path
 from typing import Optional
+from proxy.utils import build_github_opener
 
 try:
     import pyperclip
@@ -219,9 +222,6 @@ def update_ctk_form(
 
 
 def _perform_update(download_url: str, set_status=None) -> None:
-    import tempfile
-    import urllib.request
-
     def _step(msg: str) -> None:
         log.info("Update: %s", msg)
         if set_status:
@@ -244,7 +244,14 @@ def _perform_update(download_url: str, set_status=None) -> None:
         os.close(fd)
         tmp_path = Path(tmp_name)
         log.info("Downloading update from %s", download_url)
-        urllib.request.urlretrieve(download_url, str(tmp_path))
+        opener = build_github_opener()
+        with opener.open(download_url) as _resp:
+            with open(str(tmp_path), "wb") as _fout:
+                while True:
+                    _chunk = _resp.read(65536)
+                    if not _chunk:
+                        break
+                    _fout.write(_chunk)
     except Exception as exc:
         _err(f"Не удалось скачать:\n{exc}")
         if tmp_path: