diff --git a/requirements/base.txt b/requirements/base.txt
index ba05e16..281051b 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -11,6 +11,6 @@ python-postmark==0.6.0
 Markdown==3.4.4
 Pillow==10.0.1
 raven==6.10.0
-icalendar==5.0.7
+icalendar==5.0.9
 requests==2.31.0
 arrow==1.2.3