diff --git a/pyproject.toml b/pyproject.toml
index 81381c8..6c0524e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-dev = ["pytest>=8"]
+dev = ["pytest>=8", "pytest-asyncio"]
 mcp = ["mcp>=1.10,<2"]
 
 [project.scripts]