diff --git a/pyproject.toml b/pyproject.toml
index 8ff2796..2c58647 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,3 +46,6 @@ build-backend = "pdm.pep517.api"
 
 [project.scripts]
 batdetect2 = "bat_detect.command:main"
+
+[tool.black]
+line-length = 80