diff --git a/src/android/QRScanner.java b/src/android/QRScanner.java
index f2e37d7d..a17e1808 100755
--- a/src/android/QRScanner.java
+++ b/src/android/QRScanner.java
@@ -24,7 +24,7 @@
 import org.json.JSONObject;
 import android.hardware.Camera;
 import android.provider.Settings;
-import android.support.v4.app.ActivityCompat;
+import androidx.core.app.ActivityCompat;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 
@@ -619,7 +619,7 @@ private void show(final CallbackContext callbackContext) {
         this.cordova.getActivity().runOnUiThread(new Runnable() {
             @Override
             public void run() {
-                webView.getView().setBackgroundColor(Color.argb(1, 0, 0, 0));
+                webView.getView().setBackgroundColor(Color.TRANSPARENT);
                 showing = true;
                 getStatus(callbackContext);
             }
diff --git a/src/android/qrscanner.gradle b/src/android/qrscanner.gradle
index df682e76..6188e342 100644
--- a/src/android/qrscanner.gradle
+++ b/src/android/qrscanner.gradle
@@ -3,8 +3,8 @@ repositories {
 }
 
 dependencies {
-    compile 'com.journeyapps:zxing-android-embedded:3.3.0'
-    compile 'com.android.support:appcompat-v7:23.1.0'
+    implementation 'com.journeyapps:zxing-android-embedded:3.3.0'
+    implementation 'com.android.support:appcompat-v7:23.1.0'
 }
 
 android {
diff --git a/src/ios/QRScanner.swift b/src/ios/QRScanner.swift
index d98099cb..d88fdb33 100644
--- a/src/ios/QRScanner.swift
+++ b/src/ios/QRScanner.swift
@@ -133,13 +133,17 @@ class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
             if (captureSession?.isRunning != true){
                 cameraView.backgroundColor = UIColor.clear
                 self.webView!.superview!.insertSubview(cameraView, belowSubview: self.webView!)
-                let availableVideoDevices =  AVCaptureDevice.devices(for: AVMediaType.video)
-                for device in availableVideoDevices {
-                    if device.position == AVCaptureDevice.Position.back {
-                        backCamera = device
+               let session = AVCaptureDevice.DiscoverySession(deviceTypes: [.builtInWideAngleCamera], mediaType: AVMediaType.video, position: .unspecified)
+                let cameras = session.devices.compactMap { $0 }
+                for camera in cameras {
+                    if camera.position == .front {
+                        self.frontCamera = camera
                     }
-                    else if device.position == AVCaptureDevice.Position.front {
-                        frontCamera = device
+                   if camera.position == .back {
+                        self.backCamera = camera
+                        try camera.lockForConfiguration()
+                        camera.focusMode = .continuousAutoFocus
+                        camera.unlockForConfiguration()
                     }
                 }
                 // older iPods have no back camera
@@ -197,8 +201,9 @@ class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
     }
 
     @objc func makeOpaque(){
-        self.webView?.isOpaque = false
-        self.webView?.backgroundColor = UIColor.clear
+        self.webView?.isOpaque = true
+        self.webView?.backgroundColor = UIColor.white
+        self.webView?.scrollView.backgroundColor = UIColor.white
     }
 
     @objc func boolToNumberString(bool: Bool) -> String{
@@ -292,6 +297,7 @@ class QRScanner : CDVPlugin, AVCaptureMetadataOutputObjectsDelegate {
     @objc func show(_ command: CDVInvokedUrlCommand) {
         self.webView?.isOpaque = false
         self.webView?.backgroundColor = UIColor.clear
+        self.webView?.scrollView.backgroundColor = UIColor.clear
         self.getStatus(command)
     }