diff --git a/pyproject.toml b/pyproject.toml
index 02a60db..9f4a948 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,6 +18,7 @@ dependencies = [
     "jupyter-client",
     "nbconvert",
     "ipykernel",
+    "black",
 ]
 
 [project.scripts]