diff --git a/Example/Pods/Pods.xcodeproj/xcuserdata/hsb9kr.xcuserdatad/xcschemes/xcschememanagement.plist b/Example/Pods/Pods.xcodeproj/xcuserdata/hsb9kr.xcuserdatad/xcschemes/xcschememanagement.plist
new file mode 100644
index 0000000..c0d06ca
--- /dev/null
+++ b/Example/Pods/Pods.xcodeproj/xcuserdata/hsb9kr.xcuserdatad/xcschemes/xcschememanagement.plist
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>Alamofire.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>1</integer>
+		</dict>
+		<key>AlamofireImage.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>2</integer>
+		</dict>
+		<key>AlamofireObjectMapper.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>3</integer>
+		</dict>
+		<key>CryptoSwift.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>4</integer>
+		</dict>
+		<key>ObjectMapper.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>5</integer>
+		</dict>
+		<key>Pods-SwiftyBootpay_Example.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>6</integer>
+		</dict>
+		<key>SwiftyBootpay.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>7</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>
diff --git a/Example/SwiftyBootpay.xcodeproj/xcuserdata/hsb9kr.xcuserdatad/xcschemes/xcschememanagement.plist b/Example/SwiftyBootpay.xcodeproj/xcuserdata/hsb9kr.xcuserdatad/xcschemes/xcschememanagement.plist
new file mode 100644
index 0000000..30277d2
--- /dev/null
+++ b/Example/SwiftyBootpay.xcodeproj/xcuserdata/hsb9kr.xcuserdatad/xcschemes/xcschememanagement.plist
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>SwiftyBootpay-Example.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>
diff --git a/Example/SwiftyBootpay.xcworkspace/xcuserdata/hsb9kr.xcuserdatad/UserInterfaceState.xcuserstate b/Example/SwiftyBootpay.xcworkspace/xcuserdata/hsb9kr.xcuserdatad/UserInterfaceState.xcuserstate
new file mode 100644
index 0000000..df32920
Binary files /dev/null and b/Example/SwiftyBootpay.xcworkspace/xcuserdata/hsb9kr.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/SwiftyBootpay/Classes/BootpayController.swift b/SwiftyBootpay/Classes/BootpayController.swift
index a16aeda..35cd0ab 100644
--- a/SwiftyBootpay/Classes/BootpayController.swift
+++ b/SwiftyBootpay/Classes/BootpayController.swift
@@ -78,7 +78,7 @@ extension URL {
 //    @objc public var account_expire_at = "" // 가상계좌 입금 만료 기한
 //    @objc public var quotas = [0,2,3,4,5,6,7,8,9,10,11,12] // 할부 개월 수
     var isPaying = false
-    @objc public var sendable: BootpayRequestProtocol?
+    @objc public weak var sendable: BootpayRequestProtocol?
     
     internal var wv: BootpayWebView!
 }
diff --git a/SwiftyBootpay/Classes/BootpayWebView.swift b/SwiftyBootpay/Classes/BootpayWebView.swift
index ba4b75e..8144207 100644
--- a/SwiftyBootpay/Classes/BootpayWebView.swift
+++ b/SwiftyBootpay/Classes/BootpayWebView.swift
@@ -24,7 +24,7 @@ import WebKit
     final let BASE_URL = "https://inapp.bootpay.co.kr/3.0.4/production.html"
     final let bridgeName = "Bootpay_iOS"
     var firstLoad = false
-    var sendable: BootpayRequestProtocol?
+    weak var sendable: BootpayRequestProtocol?
     var bootpayScript = ""
     var parentController: BootpayController!
     func bootpayRequest(_ script: String) {