diff --git a/requirements.dev.txt b/requirements.dev.txt
index 90e1918..1d2544c 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -8,7 +8,7 @@ attrs==23.1.0
     # via
     #   cattrs
     #   requests-cache
-black==23.7.0
+black==23.9.1
     # via -r requirements.dev.in
 build==0.10.0
     # via pip-tools