diff --git a/pyproject.toml b/pyproject.toml
index 4144553..8060c3b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,6 +49,9 @@ tox-poetry = "^0.4.1"
 [tool.poetry.scripts]
 mcstatus = 'mcstatus.scripts.mcstatus:cli'
 
+[tool.black]
+line-length = 127
+
 [build-system]
 requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
diff --git a/tox.ini b/tox.ini
index 48dcd5d..57ba735 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,11 +12,11 @@ commands =
 
 [testenv:format]
 commands =
-  black -l 127 ./mcstatus
+  black ./mcstatus
 
 [testenv:format-check]
 commands =
-  black --check -l 127 ./mcstatus
+  black --check ./mcstatus
 
 [testenv:lint]
 platform = linux|darwin