diff --git a/apps/desktop/src/renderer/features/todo-agent/TodoManager/SchedulesSection/components/ScheduleEditorDialog/ScheduleEditorDialog.tsx b/apps/desktop/src/renderer/features/todo-agent/TodoManager/SchedulesSection/components/ScheduleEditorDialog/ScheduleEditorDialog.tsx
index a0d6c0728b0..b237f5c3646 100644
--- a/apps/desktop/src/renderer/features/todo-agent/TodoManager/SchedulesSection/components/ScheduleEditorDialog/ScheduleEditorDialog.tsx
+++ b/apps/desktop/src/renderer/features/todo-agent/TodoManager/SchedulesSection/components/ScheduleEditorDialog/ScheduleEditorDialog.tsx
@@ -264,7 +264,7 @@ export function ScheduleEditorDialog({
 
 	return (
 		<Dialog open={open} onOpenChange={onOpenChange}>
-			<DialogContent className="max-w-5xl sm:max-w-5xl w-[92vw] max-h-[90vh] overflow-y-auto">
+			<DialogContent className="!w-[min(1280px,92vw)] !max-w-[min(1280px,92vw)] sm:!max-w-[min(1280px,92vw)] max-h-[90vh] overflow-y-auto">
 				<DialogHeader>
 					<DialogTitle>
 						{initial ? "スケジュールを編集" : "新しいスケジュール"}
diff --git a/apps/desktop/src/renderer/features/todo-agent/TodoModal/TodoModal.tsx b/apps/desktop/src/renderer/features/todo-agent/TodoModal/TodoModal.tsx
index 11e708087be..ef51ca59a5f 100644
--- a/apps/desktop/src/renderer/features/todo-agent/TodoModal/TodoModal.tsx
+++ b/apps/desktop/src/renderer/features/todo-agent/TodoModal/TodoModal.tsx
@@ -237,7 +237,7 @@ export function TodoModal({
 
 	return (
 		<Dialog open={open} onOpenChange={handleOpenChange}>
-			<DialogContent className="max-w-xl sm:max-w-xl rounded-xl">
+			<DialogContent className="!max-w-[min(640px,calc(100vw-2rem))] sm:!max-w-[min(640px,calc(100vw-2rem))] rounded-xl">
 				<DialogHeader>
 					<DialogTitle>新しい自律 TODO</DialogTitle>
 				</DialogHeader>