diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 2272a25..3c635d7 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -34,7 +34,7 @@ dev = [
     "pytest>=8.3",
     "pytest-asyncio>=0.24",
     "ruff>=0.7",
-    "mypy>=1.13",
+    "mypy>=2.3.1",
     "httpx>=0.28",
     "aiosqlite>=0.20",
 ]