diff --git a/pyproject.toml b/pyproject.toml
index 14fcf1d..8b72e42 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-  "pytest>=8.0,<9.0",
+  "pytest>=8.0,<10.0",
   "ruff>=0.6,<1.0",
   "mypy>=1.11,<2.0",
 ]