diff --git a/requirements.txt b/requirements.txt
index f63ab021..852f43dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ types-certifi==2021.10.8.2
 pytest==7.1.2
 pytest-asyncio==0.19.0
 pytest-trio==0.7.0
-trio==0.20.0
+trio==0.21.0
 trio-typing==0.7.0
 trustme==0.9.0
 uvicorn==0.18.3