diff --git a/pyproject.toml b/pyproject.toml
index 08eadd4..8472701 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "async-timeout==4.0.3",
+    "async-timeout==5.0.0",
     "coverage==7.6.4",
     "flit==3.10.1",
 ]