diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 2272a25..c7dcf76 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "pytest>=8.3",
+    "pytest>=9.1.1",
     "pytest-asyncio>=0.24",
     "ruff>=0.7",
     "mypy>=1.13",