diff --git a/pyproject.toml b/pyproject.toml
index a996844..22fba5e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ Repository = "https://github.com/team23/pydantic-partial"
 
 [dependency-groups]
 dev = [
-    "pytest>=8.4.2,<9.0.0",
+    "pytest>=8.4.2,<10.0.0",
     "pytest-cov>=7.0.0,<8",
     "tox>=4.30.3,<5.0",
     "ruff>=0.14.0,<0.15.0",