diff --git a/setup.py b/setup.py
index 55e8fe4..8b632a9 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@
 install_requires = [
     'ConfigArgParse>=0.11.0,<2',
     'aiohttp>=3.7,<4',
-    'async-timeout>=2,<4',
+    'async-timeout>=2,<5',
     'appdirs>=1.4,<1.5',
     'readlike>=0.1.2,<0.2',
     'requests>=2.6.0,<3',  # uses semantic versioning (after 2.6)