diff --git a/lib/ui/update_dialog.dart b/lib/ui/update_dialog.dart
index 4424089..b679951 100644
--- a/lib/ui/update_dialog.dart
+++ b/lib/ui/update_dialog.dart
@@ -1,3 +1,4 @@
+import 'dart:math' as math;
 import 'dart:io';
 
 import 'package:flutter/material.dart';
@@ -211,10 +212,7 @@ class _VersionPickerState extends State<_VersionPicker> {
               final all = snap.data!;
               if (all.isEmpty) return Center(child: Text(tr('올려 둔 버전이 없습니다.')));
               final newest = all.first.version;
-              return Row(crossAxisAlignment: CrossAxisAlignment.start, children: [
-                SizedBox(
-                  width: 300,
-                  child: ListView(children: [
+              final list = ListView(children: [
                     Padding(
                       padding: const EdgeInsets.fromLTRB(4, 0, 4, 8),
                       child: Text(trf('지금 쓰는 버전: v{0}', [widget.current]),
@@ -236,11 +234,8 @@ class _VersionPickerState extends State<_VersionPicker> {
                         enabled: r.zipUrl != null,
                         onTap: () => setState(() => _sel = r),
                       ),
-                  ]),
-                ),
-                const VerticalDivider(width: 16),
-                Expanded(
-                  child: _sel == null
+                  ]);
+              final detail = _sel == null
                       ? const SizedBox()
                       : Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
                           Text('v${_sel!.version}', style: const TextStyle(fontSize: 16, fontWeight: FontWeight.w600)),
@@ -262,9 +257,21 @@ class _VersionPickerState extends State<_VersionPicker> {
                           Text(tr('바뀐 내용'), style: const TextStyle(fontWeight: FontWeight.w600)),
                           const SizedBox(height: 4),
                           Expanded(child: _Notes(_sel!.notes)),
-                        ]),
-                ),
-              ]);
+                        ]);
+              // 168: 좁은 화면 (폰) 에서는 목록 위 · 고른 버전의 바뀐 내용 아래 (나란히 두면 바뀐 내용 칸이 너무 좁았다)
+              return LayoutBuilder(
+                builder: (context, box) => box.maxWidth < 560
+                    ? Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
+                        SizedBox(height: math.min(200, box.maxHeight * 0.4), child: list),
+                        const Divider(height: 16),
+                        Expanded(child: detail),
+                      ])
+                    : Row(crossAxisAlignment: CrossAxisAlignment.start, children: [
+                        SizedBox(width: 300, child: list),
+                        const VerticalDivider(width: 16),
+                        Expanded(child: detail),
+                      ]),
+              );
             },
           ),
         ),
diff --git a/test/update_ui_test.dart b/test/update_ui_test.dart
index 8b06fbe..f4dead9 100644
--- a/test/update_ui_test.dart
+++ b/test/update_ui_test.dart
@@ -217,8 +217,8 @@ void main() {
         data.deleteSync(recursive: true);
       });
 
-      Future<void> openPicker(WidgetTester tester) async {
-        tester.view.physicalSize = const Size(1200, 900);
+      Future<void> openPicker(WidgetTester tester, {Size size = const Size(1200, 900)}) async {
+        tester.view.physicalSize = size;
         tester.view.devicePixelRatio = 1;
         addTearDown(tester.view.reset);
         await tester.pumpWidget(MaterialApp(
@@ -230,6 +230,19 @@ void main() {
         await tester.pumpAndSettle();
       }
 
+      testWidgets('168: 좁은 화면 (폰) 에서는 목록 위 · 바뀐 내용 아래 (넓으면 나란히)', (tester) async {
+        await openPicker(tester, size: const Size(400, 800));
+        final list = tester.getTopLeft(find.text('v1.0.0').first);
+        final notes = tester.getTopLeft(find.text('바뀐 내용'));
+        expect(notes.dy, greaterThan(list.dy), reason: '바뀐 내용은 목록 아래');
+        expect(tester.getSize(find.text('바뀐 내용')).width, lessThan(400));
+        await tester.tap(find.text('닫기'));
+        await tester.pumpAndSettle();
+        await openPicker(tester);
+        expect(tester.getTopLeft(find.text('바뀐 내용')).dx, greaterThan(tester.getTopLeft(find.text('v1.0.0').first).dx + 200),
+            reason: '넓으면 나란히 (오른쪽)');
+      });
+
       testWidgets('올려 둔 모든 버전 · 지금 · 최신 표시 → 예전 버전으로 되돌리기 (설치 전 설정 보관, 비밀 값 빼고)', (tester) async {
         await openPicker(tester);
         expect(find.text('버전 고르기'), findsOneWidget);