diff --git a/eng/black-pyproject.toml b/eng/black-pyproject.toml
index 30e6cdc1416e..2d3e3800d647 100644
--- a/eng/black-pyproject.toml
+++ b/eng/black-pyproject.toml
@@ -1,6 +1,6 @@
 [tool.black]
 line-length = 120
-extend-exclude = '''
+force-exclude = '''
 # Exclude some directories from formatting (note the slashes surrounding the pattern)
 /(
   azure/ai/ml/_restclient