diff --git a/bin/calendar-events-exporter.sh b/bin/calendar-events-exporter.sh
index 7ed5745..fc18807 100755
--- a/bin/calendar-events-exporter.sh
+++ b/bin/calendar-events-exporter.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
-curl -sH "Accept: application/calendar+json" "https://cloud.kraut.space/remote.php/dav/public-calendars/2EkPGt3PF6WwYsA3?export&expand=1&start=$(date -d "" +%s)&end=$(date -d "next month" +%s)" \
+CAL_URL="https://cloud.kraut.space/remote.php/dav/public-calendars/2EkPGt3PF6WwYsA3?export&expand=1&start=$(date -d '' +%s)&end=$(date -d 'next month' +%s)"
+
+curl -sH "Accept: application/calendar+json" "${CAL_URL}" \
 	| jq -r '.[2] | map({_type: .[0]} + (.[1] | map({key: .[0], value: .[3]}) | from_entries))' \
 	> ./events.json