diff --git a/KMNavigationBarTransition.podspec b/KMNavigationBarTransition.podspec
index f9a47a2..423a00f 100644
--- a/KMNavigationBarTransition.podspec
+++ b/KMNavigationBarTransition.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "KMNavigationBarTransition"
-  s.version      = "1.1.10"
+  s.version      = "1.1.11"
   s.summary      = "A drop-in universal library makes transition animations smooth between different navigation bar styles while pushing or popping."
 
   s.description  = <<-DESC
@@ -20,7 +20,7 @@ Pod::Spec.new do |s|
   s.author             = { "Zhouqi Mo" => "mozhouqi@gmail.com" }
   s.social_media_url   = "https://twitter.com/MoZhouqi"
 
-  s.platform     = :ios, "7.0"
+  s.platform     = :ios, "9.0"
 
   s.source       = { :git => "https://github.com/MoZhouqi/KMNavigationBarTransition.git", :tag => s.version }
 
diff --git a/KMNavigationBarTransition.xcodeproj/project.pbxproj b/KMNavigationBarTransition.xcodeproj/project.pbxproj
index 8db4a2a..be54b73 100644
--- a/KMNavigationBarTransition.xcodeproj/project.pbxproj
+++ b/KMNavigationBarTransition.xcodeproj/project.pbxproj
@@ -414,7 +414,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
@@ -456,7 +456,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
@@ -471,7 +471,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				INFOPLIST_FILE = "$(SRCROOT)/Example/Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mo.KMNavigationBarTransition-Example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -484,7 +484,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				INFOPLIST_FILE = "$(SRCROOT)/Example/Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.mo.KMNavigationBarTransition-Example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -507,7 +507,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = KMNavigationBarTransition/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.mo.KMNavigationBarTransition;
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -532,7 +532,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = KMNavigationBarTransition/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.mo.KMNavigationBarTransition;
 				PRODUCT_NAME = "$(TARGET_NAME)";