diff --git a/lib/sort-config.ts b/lib/sort-config.ts
index dc9da95..e599b34 100644
--- a/lib/sort-config.ts
+++ b/lib/sort-config.ts
@@ -106,7 +106,12 @@ function compareValues<T>(a: T, b: T, direction: SortDirection): number {
  * Obtient la valeur de priorité numérique pour le tri
  */
 function getPriorityValue(priority: TaskPriority): number {
-  return getPriorityConfig(priority).order;
+  const config = getPriorityConfig(priority);
+  if (!config) {
+    console.warn(`⚠️ Priorité inconnue: ${priority}, utilisation de 'medium' par défaut`);
+    return getPriorityConfig('medium').order;
+  }
+  return config.order;
 }
 
 /**
diff --git a/services/jira.ts b/services/jira.ts
index 9554f42..279871a 100644
--- a/services/jira.ts
+++ b/services/jira.ts
@@ -607,7 +607,7 @@ export class JiraService {
     if (!jiraPriority) return 'medium';
 
     const priorityMapping: Record<string, string> = {
-      'Highest': 'critical',
+      'Highest': 'urgent',
       'High': 'high', 
       'Medium': 'medium',
       'Low': 'low',