diff --git a/tox.ini b/tox.ini
index 1832135..f16aab4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ deps =
     jinja2
     channels
     daphne
-    pytest-asyncio
+    pytest-asyncio: pytest-asyncio==0.23.2
     channels_redis
 usedevelop = True
 commands =