diff --git a/requirements.txt b/requirements.txt
index 0759c824..522a8ef8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,6 +9,6 @@ pytest==5.4.2; python_version>="3.5"
 six==1.14.0
 tornado==5.1.1; python_version<"3.6"
 tornado==6.0.4; python_version>="3.6"
-trio==0.13.0; python_version>="3.6"
+trio==0.15.0; python_version>="3.6"
 outcome==1.0.1; python_version>="3.5"
 attrs==19.3.0; python_version>="3.5"