diff --git a/CHANGELOG.md b/CHANGELOG.md
index 513ec84..48c2288 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to DotoryCount are recorded in this file.
 
+## [0.4.1] - 2026-09-24
+
+- Keep the iPhone experience in portrait, where the photographic jar and date
+  card have the intended spacing. This prevents overlap while the device is
+  held sideways.
+- Bumped the app to version 0.4.1 (build 9).
+
 ## [0.4.0] - 2026-09-24
 
 - Replaced the fixed home-screen film with an icon-matched glass jar assembled from
diff --git a/DotoryCount.xcodeproj/project.pbxproj b/DotoryCount.xcodeproj/project.pbxproj
index 3d09706..5110ddb 100644
--- a/DotoryCount.xcodeproj/project.pbxproj
+++ b/DotoryCount.xcodeproj/project.pbxproj
@@ -396,7 +396,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 8;
+				CURRENT_PROJECT_VERSION = 9;
 				DEVELOPMENT_TEAM = W395S42ZJ9;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
@@ -404,12 +404,12 @@
 				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
 				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = UIInterfaceOrientationPortrait;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.4.0;
+				MARKETING_VERSION = 0.4.1;
 				PRODUCT_BUNDLE_IDENTIFIER = com.dotoryman.dotorycount;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
@@ -428,7 +428,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 8;
+				CURRENT_PROJECT_VERSION = 9;
 				DEVELOPMENT_TEAM = W395S42ZJ9;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
@@ -436,12 +436,12 @@
 				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
 				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = UIInterfaceOrientationPortrait;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 0.4.0;
+				MARKETING_VERSION = 0.4.1;
 				PRODUCT_BUNDLE_IDENTIFIER = com.dotoryman.dotorycount;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
@@ -459,10 +459,10 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 8;
+				CURRENT_PROJECT_VERSION = 9;
 				GENERATE_INFOPLIST_FILE = YES;
 				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
-				MARKETING_VERSION = 0.4.0;
+				MARKETING_VERSION = 0.4.1;
 				PRODUCT_BUNDLE_IDENTIFIER = com.dotoryman.dotorycount.tests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRING_CATALOG_GENERATE_SYMBOLS = NO;
@@ -480,10 +480,10 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 8;
+				CURRENT_PROJECT_VERSION = 9;
 				GENERATE_INFOPLIST_FILE = YES;
 				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
-				MARKETING_VERSION = 0.4.0;
+				MARKETING_VERSION = 0.4.1;
 				PRODUCT_BUNDLE_IDENTIFIER = com.dotoryman.dotorycount.tests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRING_CATALOG_GENERATE_SYMBOLS = NO;
@@ -500,9 +500,9 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 8;
+				CURRENT_PROJECT_VERSION = 9;
 				GENERATE_INFOPLIST_FILE = YES;
-				MARKETING_VERSION = 0.4.0;
+				MARKETING_VERSION = 0.4.1;
 				PRODUCT_BUNDLE_IDENTIFIER = com.dotoryman.dotorycount.uitests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRING_CATALOG_GENERATE_SYMBOLS = NO;
@@ -519,9 +519,9 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 8;
+				CURRENT_PROJECT_VERSION = 9;
 				GENERATE_INFOPLIST_FILE = YES;
-				MARKETING_VERSION = 0.4.0;
+				MARKETING_VERSION = 0.4.1;
 				PRODUCT_BUNDLE_IDENTIFIER = com.dotoryman.dotorycount.uitests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRING_CATALOG_GENERATE_SYMBOLS = NO;
diff --git a/README.md b/README.md
index 4544b10..1a45d19 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,8 @@ An iOS app that records meaningful time by adding one acorn to a jar each day.
 
 **언어 및 기술 · Languages & Technologies:** Swift · SwiftUI · SwiftData
 
-v0.4.0: 사실적인 36단계 도토리 병, 낙하 애니메이션, 편리해진 기준일 선택.
+v0.4.1: 사실적인 36단계 도토리 병, 낙하 애니메이션, 편리해진 기준일 선택. 아이폰은 세로 화면에 맞춰 표시됩니다.
 
-v0.4.0: A 36-stage photographic jar, animated acorn drops, and easier date selection.
+v0.4.1: A 36-stage photographic jar, animated acorn drops, easier date selection, and a portrait iPhone layout.
 
 [변경 이력 · Changelog](CHANGELOG.md) · [개발 계획 · Roadmap](ROADMAP.md)