diff --git a/README.md b/README.md
index fb52ee8..f451e38 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ In order to use this library, you need to have a free account on <http://pusher.
 ## Features
 
 * Python 2.7, 3.4, 3.5 and 3.6 support
-* Adapters for various http libraries like requests, urlfetch, aiohttp and tornado.
+* Adapters for various http libraries like requests, urlfetch, aiohttp (requires Python >= 3.5.3) and tornado.
 * WebHook validation
 * Signature generation for socket subscriptions
 
diff --git a/pusher_tests/test_aiohttp_adapter.py b/pusher_tests/test_aiohttp_adapter.py
index 72b1121..8b44a65 100644
--- a/pusher_tests/test_aiohttp_adapter.py
+++ b/pusher_tests/test_aiohttp_adapter.py
@@ -1,4 +1,4 @@
 import sys
 
-if sys.version_info >= (3,3):
+if sys.version_info >= (3,5,3):
     from .aio.aiohttp_adapter_test import *