diff --git a/dev-requirements.txt b/dev-requirements.txt
index 29d5258..5d1b20f 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -7,4 +7,4 @@ icalendar==4.1.1
 # test
 pytest==7.4.4
 coverage==6.5.0
-black==23.12.1
+black==24.1.1