diff --git a/zhenxun/utils/http_utils.py b/zhenxun/utils/http_utils.py
index f31dac14..9df95112 100644
--- a/zhenxun/utils/http_utils.py
+++ b/zhenxun/utils/http_utils.py
@@ -37,17 +37,12 @@ def get_async_client(proxies=None, **kwargs):
     try:
         return httpx.AsyncClient(proxies=proxies, **kwargs)
     except TypeError:
-        return httpx.AsyncClient(
-            mounts={
-                "http://": httpx.AsyncHTTPTransport(proxy=proxies.get("http"))
-                if proxies
-                else None,
-                "https://": httpx.AsyncHTTPTransport(proxy=proxies.get("https"))
-                if proxies
-                else None,
-            },
-            **kwargs,
-        )
+        return httpx.AsyncClient(mounts={
+            k: v for k, v in {
+                "http://": httpx.AsyncHTTPTransport(proxy=proxies.get("http")) if proxies else None,
+                "https://": httpx.AsyncHTTPTransport(proxy=proxies.get("https")) if proxies else None
+            }.items() if v is not None
+        }, **kwargs)
 
 
 class AsyncHttpx: