diff --git a/requirements.txt b/requirements.txt
index 899a118..42dfa7c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ black==23.9.1
 mypy==1.5.1
 pytest==7.4.2
 ruff==0.0.291
+trio>0.20.0