diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..04c2cbb
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+xcuserdata/
+xcshareddata/
+.DS_Store
+
diff --git a/CallbackURLKit.xcodeproj/project.pbxproj b/CallbackURLKit.xcodeproj/project.pbxproj
index f030aaa..a05fc15 100644
--- a/CallbackURLKit.xcodeproj/project.pbxproj
+++ b/CallbackURLKit.xcodeproj/project.pbxproj
@@ -446,7 +446,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.14;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -502,7 +502,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.14;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
diff --git a/Package.swift b/Package.swift
index 195a916..06437a5 100644
--- a/Package.swift
+++ b/Package.swift
@@ -24,7 +24,7 @@ import PackageDescription
 
 let package = Package(
     name: "CallbackURLKit",
-    platforms: [.iOS(.v11), .macOS(.v10_14), .tvOS(.v10)],
+    platforms: [.iOS(.v9), .macOS(.v10_14), .tvOS(.v10)],
     products: [
         .library(name: "CallbackURLKit", targets: ["CallbackURLKit"])
     ],
diff --git a/Sources/Manager.swift b/Sources/Manager.swift
index f932d7a..89ca750 100644
--- a/Sources/Manager.swift
+++ b/Sources/Manager.swift
@@ -41,7 +41,7 @@ open class Manager {
 
     open var callbackURLScheme: String?
 
-    open var callbackQueue: DispatchQueue = .main
+    open var callbackQueue: DispatchQueue = .global(qos: .background) // .main
 
     #if APP_EXTENSIONS
     /// In case of application extension, put your extensionContext here
@@ -252,14 +252,34 @@ open class Manager {
             extensionContext.open(url, completionHandler: extensionContextCompletionHandler)
         } else {
             #if os(iOS) || os(tvOS)
-            UIApplication.shared.open(url)
+            guard UIApplication.shared.canOpenURL(url) else {
+                return
+            }
+            if #available(iOS 10.0, tvOS 10.0, *) {
+                UIApplication.shared.open(url, options: [:]) { success in
+                    _ = success
+                    NSLog("open url \(success)")
+                }
+            } else {
+                UIApplication.shared.openURL(url)
+            }
             #elseif os(OSX)
             NSWorkspace.shared.open(url)
             #endif
         }
         #else
         #if os(iOS) || os(tvOS)
-        UIApplication.shared.open(url)
+        guard UIApplication.shared.canOpenURL(url) else {
+            return
+        }
+        if #available(iOS 10.0, tvOS 10.0, *) {
+            UIApplication.shared.open(url, options: [:]) { success in
+                _ = success
+                NSLog("open url \(success)")
+            }
+        } else {
+            UIApplication.shared.openURL(url)
+        }
         #elseif os(OSX)
         NSWorkspace.shared.open(url)
         #endif