diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 30e5437b..85fd29cd 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -24,7 +24,7 @@ dev = [
     "pytest>=9.0.3",
     "pytest-asyncio>=0.25.0",
     "pytest-httpx>=0.35.0",
-    "ruff>=0.9.0",
+    "ruff>=0.15.22",
     "testcontainers>=4.0",
 ]