diff --git a/pyproject.toml b/pyproject.toml
index 2379ca3..068ddf7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-dev = ["pytest==8.4.0"]
+dev = ["pytest==9.0.3"]
 
 [tool.setuptools]
 # This replaces the need for find_packages() in setup.py