diff --git a/pyproject.toml b/pyproject.toml
index 47f1307ead292b4696d1d66b8c8501e070c1c455..5e430824737bf6e097d3cbad30a633f3a73aeadb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,5 +42,8 @@ build-backend = "poetry.core.masonry.api"
 [tool.ruff.per-file-ignores]
 "*.ipynb" = ["ALL"]
 
+[tool.ruff]
+line-length = 88
+
 [tool.mypy]
 ignore_missing_imports = true