diff --git a/build-constraints.yaml b/build-constraints.yaml
index 12540f06..14e3fd76 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -206,6 +206,7 @@ packages:
 
     "Jakob Schöttl <jakob.schoettl@intensovet.de> @schoettl":
         - bank-holiday-germany
+        - iCalendar
 
     "Mihai Giurgeanu <mihai.giurgeanu@gmail.com> @mihaigiurgeanu":
         - sqlcli