diff --git a/requirements-testing.txt b/requirements-testing.txt
index 4a7176e..37b56df 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -5,5 +5,5 @@ pytest-cov ~= 4.1
 pytest-xdist ~= 3.3
 twine ~= 4.0
 mypy ~= 1.5
-black ~= 23.7
+black ~= 23.9
 ruff ~= 0.0.287
\ No newline at end of file