diff --git a/vllm/connections.py b/vllm/connections.py
index e785a0b3ebd74..4c9f4f40cf640 100644
--- a/vllm/connections.py
+++ b/vllm/connections.py
@@ -29,7 +29,7 @@ def get_sync_client(self) -> requests.Session:
     # required, so that the client is only accessible inside async event loop
     async def get_async_client(self) -> aiohttp.ClientSession:
         if self._async_client is None or not self.reuse_client:
-            self._async_client = aiohttp.ClientSession()
+            self._async_client = aiohttp.ClientSession(trust_env=True)
 
         return self._async_client