diff --git a/requirements-testing.txt b/requirements-testing.txt
index bcddae1e..e9524538 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -3,7 +3,7 @@ deadline-cloud-test-fixtures ~= 0.3.0
 pytest ~= 7.4
 pytest-cov ~= 4.1.0
 pytest-xdist ~= 3.3.1
-black[jupyter] ~= 23.7
+black[jupyter] ~= 23.9
 rich == 13.5.*
 types-python-dateutil ~= 2.8
 mypy ~= 1.5