diff --git a/dev-requirements.txt b/dev-requirements.txt
index 95d995d..08c19e4 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -2,7 +2,7 @@
 requests==2.31.0
 beautifulsoup4==4.12.2
 tqdm==4.66.1
-icalendar==4.1.0
+icalendar==4.1.1
 
 # test
 pytest==7.4.1