diff --git a/.swift-version b/.swift-version
new file mode 100644
index 0000000..5186d07
--- /dev/null
+++ b/.swift-version
@@ -0,0 +1 @@
+4.0
diff --git a/LPAlbum.podspec b/LPAlbum.podspec
index 5c79613..971f754 100644
--- a/LPAlbum.podspec
+++ b/LPAlbum.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "LPAlbum"
-  s.version      = "0.0.8"
+  s.version      = "0.0.9"
   s.summary      = "Can a decent enough photo album, photo album multi-select"
 
   s.homepage     = "https://github.com/loopeer/LPAlbum"
@@ -17,5 +17,7 @@ Pod::Spec.new do |s|
 
   s.ios.deployment_target = "9.0"
   s.requires_arc = true
-  
+
+  s.pod_target_xcconfig = { 'SWIFT_VERSION' => '4.0' }
+
 end
diff --git a/README.md b/README.md
index 9ba8c8a..73038ce 100644
--- a/README.md
+++ b/README.md
@@ -152,7 +152,7 @@ platform :ios, '9.0'
 use_frameworks!
 
 target '<Your App Target>' do
-  pod 'LPAlbum'
+  pod 'LPAlbum', '~> 0.0.9'
 end
 ```