diff --git a/homeassistant/helpers/aiohttp_client.py b/homeassistant/helpers/aiohttp_client.py
index 01cc074aa6a..53b246c700d 100644
--- a/homeassistant/helpers/aiohttp_client.py
+++ b/homeassistant/helpers/aiohttp_client.py
@@ -56,7 +56,6 @@ def async_create_clientsession(hass, verify_ssl=True, auto_cleanup=True,
     clientsession = aiohttp.ClientSession(
         loop=hass.loop,
         connector=connector,
-        trust_env=True,
         headers={USER_AGENT: SERVER_SOFTWARE},
         **kwargs
     )