diff --git a/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..919434a
--- /dev/null
+++ b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
diff --git a/Package.swift b/Package.swift
index a4435dc..b1b881f 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,3 +1,4 @@
+
 //
 //  Package.swift
 //  FSPagerView
@@ -24,11 +25,17 @@
 //  THE SOFTWARE.
 
 
-// swift-tools-version:5.0
 import PackageDescription
 
 let package = Package(
     name: "FSPagerView",
-    dependencies : [],
-    exclude: []
+    platforms: [
+        .iOS(.v9)
+    ],
+    products: [
+        .library(name: "FSPagerView", targets: ["FSPagerView"]),
+    ],
+    targets: [
+        .target(name: "FSPagerView", path: "Sources", exclude: ["FSPagerViewObjcCompat.h", "FSPagerViewObjcCompat.m"]),
+    ]
 )
diff --git a/README.md b/README.md
index cc544d1..c3ff8ec 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@ pagerView.interitemSpacing = 10
 | ![1](https://cloud.githubusercontent.com/assets/5186464/22686429/1983b97e-ed5f-11e6-9a32-44c1830df7ac.gif) |
 
 ```swift
-pagerView.transformer = FSPagerViewTransformer(type: .crossfading)
+pagerView.transformer = FSPagerViewTransformer(type: .crossFading)
 ```
 ---
 
@@ -96,7 +96,7 @@ pagerView.transformer = FSPagerViewTransformer(type: .crossfading)
 | ![2](https://cloud.githubusercontent.com/assets/5186464/22686426/19830862-ed5f-11e6-90be-8fb1319cd125.gif) |
 
 ```swift
-pagerView.transformer = FSPagerViewTransformer(type: .zoomout)
+pagerView.transformer = FSPagerViewTransformer(type: .zoomOut)
 ```
 ---
 
diff --git a/Sources/FSPageViewTransformer.swift b/Sources/FSPageViewTransformer.swift
index 2878679..7f46771 100644
--- a/Sources/FSPageViewTransformer.swift
+++ b/Sources/FSPageViewTransformer.swift
@@ -26,8 +26,8 @@ open class FSPagerViewTransformer: NSObject {
     open internal(set) weak var pagerView: FSPagerView?
     open internal(set) var type: FSPagerViewTransformerType
     
-    open var minimumScale: CGFloat = 0.65
-    open var minimumAlpha: CGFloat = 0.6
+    @objc open var minimumScale: CGFloat = 0.65
+    @objc open var minimumAlpha: CGFloat = 0.6
     
     @objc
     public init(type: FSPagerViewTransformerType) {
diff --git a/Sources/FSPagerView.swift b/Sources/FSPagerView.swift
index 01edb7b..c4fa2e0 100644
--- a/Sources/FSPagerView.swift
+++ b/Sources/FSPagerView.swift
@@ -500,7 +500,8 @@ open class FSPagerView: UIView,UICollectionViewDataSource,UICollectionViewDelega
     @objc(scrollToItemAtIndex:animated:)
     open func scrollToItem(at index: Int, animated: Bool) {
         guard index < self.numberOfItems else {
-            fatalError("index \(index) is out of range [0...\(self.numberOfItems-1)]")
+            assertionFailure("index \(index) is out of range [0...\(self.numberOfItems-1)]")
+			return
         }
         let indexPath = { () -> IndexPath in
             if let indexPath = self.possibleTargetingIndexPath, indexPath.item == index {