diff --git a/requirements.txt b/requirements.txt
index 27c0f8a84..7dad09a3a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ requests==2.28.1
 six==1.16.0
 webdavclient3==3.14.6
 whitenoise==6.2.0
-icalendar==5.0.3
+icalendar==5.0.4
 pyyaml==6.0
 uritemplate==4.1.1
 beautifulsoup4==4.11.1