diff --git a/pyproject.toml b/pyproject.toml
index cdc3cc4..dd0056e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,6 +56,7 @@ extend_exclude = ".tox,docs,src/ni/pythonpanel/v1"
 
 [tool.black]
 extend-exclude = '\.tox/|docs/|src/ni/pythonpanel/v1/'
+line-length = 100
 
 [tool.mypy]
 files = "examples/,src/nipanel/,tests/"
@@ -76,4 +77,4 @@ skips = [
 
 [tool.pytest.ini_options]
 addopts = "--doctest-modules --strict-markers"
-testpaths = ["src/nipanel", "tests"]
\ No newline at end of file
+testpaths = ["src/nipanel", "tests"]