diff --git a/README.md b/README.md
index 08764d5..94fe95e 100755
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ objc version ：https://github.com/yuantiku/YTKKeyValueStore
 
 ## Requirements
 
-- iOS 8.0+ 
+- iOS 9.0+ 
 - Xcode 8.0
 - Swift 3.0
 
@@ -72,7 +72,7 @@ arrayValue        :     return  Array<AnyObject>?
 
 Update Cartfile to include the following:
 ```
-github "sgxiang/YTKKeyValueStore_Swift" ~> 0.4.1
+github "sgxiang/YTKKeyValueStore_Swift" ~> 0.4.2
 ```
 
 Run `carthage update` and [add the appropriate framework][Carthage Usage].
@@ -86,7 +86,7 @@ Update Podfile to include the following:
 ```ruby
 use_frameworks!
 
-pod 'YTKKeyValueStore_Swift', '~> 0.4.1'
+pod 'YTKKeyValueStore_Swift', '~> 0.4.2'
 ```
 
 Run `pod install`
diff --git a/Vendor/SQLite.swift b/Vendor/SQLite.swift
index 222505b..5e771a1 160000
--- a/Vendor/SQLite.swift
+++ b/Vendor/SQLite.swift
@@ -1 +1 @@
-Subproject commit 222505ba1306051b429c85cec6baf9b6abd1bf4d
+Subproject commit 5e771a1af67f52b5154cc5e9ee3f0f5f4a3e07a5
diff --git a/YTKKeyValueStore.xcodeproj/project.pbxproj b/YTKKeyValueStore.xcodeproj/project.pbxproj
index 1073891..674d694 100644
--- a/YTKKeyValueStore.xcodeproj/project.pbxproj
+++ b/YTKKeyValueStore.xcodeproj/project.pbxproj
@@ -509,7 +509,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = YTKKeyValueStore/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.sgxiang.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -531,7 +531,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = YTKKeyValueStore/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.sgxiang.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
diff --git a/YTKKeyValueStore/Info.plist b/YTKKeyValueStore/Info.plist
index 2bb1ea9..7c9f8bd 100644
--- a/YTKKeyValueStore/Info.plist
+++ b/YTKKeyValueStore/Info.plist
@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.4.1</string>
+	<string>0.4.2</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
diff --git a/YTKKeyValueStore_Swift.podspec b/YTKKeyValueStore_Swift.podspec
index 9707715..e8f98f8 100644
--- a/YTKKeyValueStore_Swift.podspec
+++ b/YTKKeyValueStore_Swift.podspec
@@ -1,12 +1,12 @@
 Pod::Spec.new do |s|
   s.name         = "YTKKeyValueStore_Swift"
-  s.version      = "0.4.1"
+  s.version      = "0.4.2"
   s.summary      = "A simple Key-Value storage tool, using Sqlite as backend."
   s.homepage     = "https://github.com/sgxiang/YTKKeyValueStore_Swift"
   s.license      = "MIT"
   s.author       = { "sgxiang" => "690228918@qq.com" }
-  s.platform     = :ios, '8.0'
-  s.source       = { :git => "https://github.com/sgxiang/YTKKeyValueStore_Swift.git", :tag => "0.4.1" }
+  s.platform     = :ios, '9.0'
+  s.source       = { :git => "https://github.com/sgxiang/YTKKeyValueStore_Swift.git", :tag => "0.4.2" }
   s.source_files = "YTKKeyValueStore/*.swift"
   s.requires_arc = true
   s.module_name  = 'YTKKeyValueStore'