diff --git a/setup.py b/setup.py
index 7e966ec..0baa025 100755
--- a/setup.py
+++ b/setup.py
@@ -44,7 +44,7 @@ setup(
         # trio related
         # proper range spec:
         # https://packaging.python.org/en/latest/discussions/install-requires-vs-requirements/#id5
-        'trio >= 0.20, < 0.22',
+        'trio >= 0.22',
         'async_generator',
         'trio_typing',