diff --git a/pyproject.toml b/pyproject.toml
index 416576b..3d158f3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ build = "build.py"
 python = "^3.8"
 
 [tool.poetry.dev-dependencies]
-pytest = "^8.0.0"
+pytest = "^9.0.0"
 black = "^21.11b1"
 Cython = "^3.0.0"