diff --git a/pyproject.toml b/pyproject.toml
index 26f17fe3715b2dff67398b8b1cd570fc57e73dca..04cd9a8fce3ed97bbed58ee821d1538e461fee3f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ flask-socketio= "5.3.4"
 Babel = "2.12.1"
 
 # services
-icalendar = "5.0.5"
+icalendar = "5.0.6"
 
 # tiles
 timeago = "1.0.16"