diff --git a/requirements/async.txt b/requirements/async.txt
index cd9c368f6..af3e49913 100644
--- a/requirements/async.txt
+++ b/requirements/async.txt
@@ -1,3 +1,3 @@
 # pip install -r requirements/async.txt
 aiohttp>=3,<4
-websockets<15
+websockets<16