diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index a886a0b..b3d723e 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -45,3 +45,6 @@ pytest-cov = "^6.0.0"
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
+
+[tool.black]
+line-length = 110
\ No newline at end of file