diff --git a/yc-app-cli/src/main/kotlin/mikufan/cx/yc/cliapp/component/IssuesGetter.kt b/yc-app-cli/src/main/kotlin/mikufan/cx/yc/cliapp/component/IssuesGetter.kt
index 898de51..2d30a0f 100644
--- a/yc-app-cli/src/main/kotlin/mikufan/cx/yc/cliapp/component/IssuesGetter.kt
+++ b/yc-app-cli/src/main/kotlin/mikufan/cx/yc/cliapp/component/IssuesGetter.kt
@@ -32,7 +32,8 @@ class IssuesGetter(
         "idReadable",
         "summary",
         "description",
-        "customFields(name,id,value(name,id))"
+        "customFields(name,id,value(name,id,minutes))" // added minutes for the duration value,
+        // required by AlarmMapper as the string representation can contain an invalid P1W format
       ) + youtrackFieldNames,
       customFields = customFieldNames,
       pageSize = searchConfig.pageSize,
diff --git a/yc-core-ical/src/main/kotlin/mikufan/cx/yc/core/ical/component/AlarmMapper.kt b/yc-core-ical/src/main/kotlin/mikufan/cx/yc/core/ical/component/AlarmMapper.kt
index 9453e5e..742194d 100644
--- a/yc-core-ical/src/main/kotlin/mikufan/cx/yc/core/ical/component/AlarmMapper.kt
+++ b/yc-core-ical/src/main/kotlin/mikufan/cx/yc/core/ical/component/AlarmMapper.kt
@@ -18,6 +18,9 @@ import java.time.Duration
  * 2023-01-03
  */
 class AlarmMapper {
+
+  companion object {
+  }
   fun createAlarm(json: YouTrackIssueJson, alarmSetting: AlarmSetting?): VAlarm? {
     if (alarmSetting == null) {
       log.info { "No alarm setting for ${json.debugName}, skipping alarm creation" }
@@ -93,8 +96,8 @@ class AlarmMapper {
       log.debug { "${json.debugName} have empty or null value in the custom field $fieldName for creating alarm" }
       return null
     }
-    val durationString = valueJson["id"].asText()
-    return Duration.parse(durationString).let {
+    val durationMinutes = valueJson["minutes"].asLong()
+    return Duration.ofMinutes(durationMinutes).let {
       if (isNegative) {
         it.negated()
       } else {