diff --git a/requirements.txt b/requirements.txt
index 441b974..9870bd3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,4 +7,4 @@ attrs
 logbook
 pygments
 matrix-nio[e2e]>=0.6
-aiohttp
+aiohttp ; python_version >= "3.5"