diff --git a/models/admin/task.go b/models/admin/task.go
index 10f8e6d5704..0541a8ec78e 100644
--- a/models/admin/task.go
+++ b/models/admin/task.go
@@ -44,7 +44,7 @@ func init() {
 // TranslatableMessage represents JSON struct that can be translated with a Locale
 type TranslatableMessage struct {
 	Format string
-	Args   []any `json:"omitempty"`
+	Args   []any `json:",omitempty"`
 }
 
 // LoadRepo loads repository of the task