diff --git a/pyproject.toml b/pyproject.toml
index acddc54..941ce9c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -59,7 +59,7 @@ all = [
 ipykernel = "^6.27.1"
 mypy = "^1.15.0"
 ruff = "^0.10.0"
-pytest = "^8.0.0"
+pytest = "^9.0.0"
 pandas-stubs = "^2.2.1.240316"
 coverage = "^7.5.1"
 ipywidgets = "^8.1.3"