diff --git a/CHANGELOG.md b/CHANGELOG.md
index 47fd2bf930..5b5714527c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Change Log
 
-5.0.6 (unreleased)
+5.0.6 (688)
 --------------------------
 
 ### New Features
diff --git a/CotEditor.xcodeproj/project.pbxproj b/CotEditor.xcodeproj/project.pbxproj
index ab059453cd..bf132349fa 100644
--- a/CotEditor.xcodeproj/project.pbxproj
+++ b/CotEditor.xcodeproj/project.pbxproj
@@ -681,12 +681,12 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = "Accent Color";
-				CURRENT_PROJECT_VERSION = 687;
+				CURRENT_PROJECT_VERSION = 688;
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_USER_SCRIPT_SANDBOXING = NO;
 				INFOPLIST_FILE = CotEditor/Info.plist;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.productivity";
-				MARKETING_VERSION = "5.0.6-alpha";
+				MARKETING_VERSION = 5.0.6;
 				PRODUCT_BUNDLE_IDENTIFIER = com.coteditor.CotEditor;
 				PRODUCT_NAME = CotEditor;
 				SWIFT_STRICT_CONCURRENCY = complete;
@@ -805,12 +805,12 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = "Accent Color";
-				CURRENT_PROJECT_VERSION = 687;
+				CURRENT_PROJECT_VERSION = 688;
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_USER_SCRIPT_SANDBOXING = NO;
 				INFOPLIST_FILE = CotEditor/Info.plist;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.productivity";
-				MARKETING_VERSION = "5.0.6-alpha";
+				MARKETING_VERSION = 5.0.6;
 				PRODUCT_BUNDLE_IDENTIFIER = com.coteditor.CotEditor;
 				PRODUCT_NAME = CotEditor;
 				SWIFT_STRICT_CONCURRENCY = complete;
@@ -908,12 +908,12 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = "Accent Color";
-				CURRENT_PROJECT_VERSION = 687;
+				CURRENT_PROJECT_VERSION = 688;
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_USER_SCRIPT_SANDBOXING = NO;
 				INFOPLIST_FILE = CotEditor/Info.plist;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.productivity";
-				MARKETING_VERSION = "5.0.6-alpha";
+				MARKETING_VERSION = 5.0.6;
 				PRODUCT_BUNDLE_IDENTIFIER = com.coteditor.CotEditor;
 				PRODUCT_NAME = CotEditor;
 				SWIFT_STRICT_CONCURRENCY = complete;
@@ -938,12 +938,12 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = "Accent Color";
-				CURRENT_PROJECT_VERSION = 687;
+				CURRENT_PROJECT_VERSION = 688;
 				ENABLE_HARDENED_RUNTIME = YES;
 				ENABLE_USER_SCRIPT_SANDBOXING = NO;
 				INFOPLIST_FILE = CotEditor/Info.plist;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.productivity";
-				MARKETING_VERSION = "5.0.6-alpha";
+				MARKETING_VERSION = 5.0.6;
 				PRODUCT_BUNDLE_IDENTIFIER = com.coteditor.CotEditor;
 				PRODUCT_NAME = CotEditor;
 				SWIFT_STRICT_CONCURRENCY = complete;