diff --git a/pyproject.toml b/pyproject.toml
index a3dd98ac..024656f8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,7 +64,7 @@ version = {attr = "diffannotator.config.__version__"}
 # see: https://setuptools.pypa.io/en/latest/userguide/pyproject_config.html#dynamic-metadata
 [project.optional-dependencies]
 dev = [
-  "pytest==8.3.5",
+  "pytest==8.4.0",
   "pytest-benchmark==5.1.0",
 ]
 doc = [