diff --git a/requirements.txt b/requirements.txt
index 5e3c4d3b..35096dac 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ types-contextvars==2.4.6
 types-PyYAML==6.0.4
 types-dataclasses==0.6.5
 pytest==7.1.2
-trio==0.19.0
+trio==0.21.0
 
 # Documentation
 mkdocs==1.3.0