diff --git a/pyproject.toml b/pyproject.toml
index 1d1b064..a6c52bc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ requires-python = ">=3.9"
 dependencies = []
 
 [project.optional-dependencies]
-dev = ["pytest>=7"]
+dev = ["pytest>=7", "pytest-timeout>=2"]
 ui = ["flask>=3.0"]
 
 [project.scripts]