diff --git a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/APNGAnimationProvider.cs b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/APNGAnimationProvider.cs
index 17b1c77..38a35d4 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/APNGAnimationProvider.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/APNGAnimationProvider.cs
@@ -1,4 +1,4 @@
-// Copyright © 2017 Paddy Xu
+// Copyright © 2018 Paddy Xu
 // 
 // This file is part of QuickLook program.
 // 
@@ -16,105 +16,180 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Media;
 using System.Windows.Media.Animation;
 using System.Windows.Media.Imaging;
+using System.Windows.Threading;
 using LibAPNG;
+using QuickLook.Common.ExtensionMethods;
 
 namespace QuickLook.Plugin.ImageViewer.AnimatedImage
 {
-    internal class APNGAnimationProvider : IAnimationProvider
+    internal class APNGAnimationProvider : AnimationProvider
     {
-        public void GetAnimator(ObjectAnimationUsingKeyFrames animator, string path)
+        private readonly List<FrameInfo> _frames;
+        private readonly List<BitmapSource> _renderedFrames;
+        private ImageMagickProvider _imageMagickProvider;
+        private int _lastEffecitvePreviousPreviousFrameIndex;
+
+        public APNGAnimationProvider(string path, Dispatcher uiDispatcher) : base(path, uiDispatcher)
         {
             var decoder = new APNGBitmap(path);
 
             if (decoder.IsSimplePNG)
             {
-                new ImageMagickProvider().GetAnimator(animator, path);
+                _imageMagickProvider = new ImageMagickProvider(path, uiDispatcher);
                 return;
             }
 
-            var clock = TimeSpan.Zero;
-            var header = decoder.IHDRChunk;
-            Frame currentFrame = null;
-            BitmapSource currentRenderedFrame = null;
-            BitmapSource previousStateRenderedFrame = null;
-            foreach (var nextFrame in decoder.Frames)
+            _frames = new List<FrameInfo>(decoder.Frames.Length);
+            _renderedFrames = new List<BitmapSource>(decoder.Frames.Length);
+            Enumerable.Repeat(0, decoder.Frames.Length).ForEach(_ => _renderedFrames.Add(null));
+
+            Animator = new Int32AnimationUsingKeyFrames {RepeatBehavior = RepeatBehavior.Forever};
+
+            var wallclock = TimeSpan.Zero;
+
+            for (var i = 0; i < decoder.Frames.Length; i++)
             {
-                var nextRenderedFrame = MakeNextFrame(header, nextFrame, currentFrame, currentRenderedFrame,
-                    previousStateRenderedFrame);
+                var frame = decoder.Frames[i];
 
-                var delay = TimeSpan.FromSeconds(
-                    (double) nextFrame.fcTLChunk.DelayNum /
-                    (nextFrame.fcTLChunk.DelayDen == 0 ? 100 : nextFrame.fcTLChunk.DelayDen));
+                _frames.Add(new FrameInfo(decoder.IHDRChunk, frame));
 
-                animator.KeyFrames.Add(new DiscreteObjectKeyFrame(nextRenderedFrame, clock));
-                clock += delay;
-
-                // the "previous state" of a "DisposeOpPrevious" frame is its previous frame, so we do not record it
-                if (currentFrame != null && currentFrame.fcTLChunk.DisposeOp != DisposeOps.APNGDisposeOpPrevious)
-                    previousStateRenderedFrame = currentRenderedFrame;
-                currentRenderedFrame = nextRenderedFrame;
-                currentFrame = nextFrame;
+                Animator.KeyFrames.Add(new DiscreteInt32KeyFrame(i, KeyTime.FromTimeSpan(wallclock)));
+                wallclock += _frames[i].Delay;
             }
-
-            animator.Duration = clock;
-            animator.RepeatBehavior = RepeatBehavior.Forever;
         }
 
-        private static BitmapSource MakeNextFrame(IHDRChunk header, Frame nextFrame, Frame currentFrame,
-            BitmapSource currentRenderedFrame, BitmapSource previousStateRenderedFrame)
+        public override Task<BitmapSource> GetRenderedFrame(int index)
         {
-            var fullRect = new Rect(0, 0, header.Width, header.Height);
-            var frameRect = new Rect(nextFrame.fcTLChunk.XOffset, nextFrame.fcTLChunk.YOffset,
-                nextFrame.fcTLChunk.Width, nextFrame.fcTLChunk.Height);
+            if (_imageMagickProvider != null)
+                return _imageMagickProvider.GetRenderedFrame(index);
+
+            if (_renderedFrames[index] != null)
+                return new Task<BitmapSource>(() => _renderedFrames[index]);
+
+            return new Task<BitmapSource>(() =>
+            {
+                var rendered = Render(index);
+                _renderedFrames[index] = rendered;
+
+                return rendered;
+            });
+        }
+
+        public override void Dispose()
+        {
+            if (_imageMagickProvider != null)
+            {
+                _imageMagickProvider.Dispose();
+                _imageMagickProvider = null;
+                return;
+            }
+
+            _frames.Clear();
+            _renderedFrames.Clear();
+        }
+
+        private BitmapSource Render(int index)
+        {
+            var currentFrame = _frames[index];
+            FrameInfo previousFrame = null;
+            BitmapSource previousRendered = null;
+            BitmapSource previousPreviousRendered = null;
+
+            if (index > 0)
+            {
+                if (_renderedFrames[index - 1] == null)
+                    _renderedFrames[index - 1] = Render(index - 1);
+
+                previousFrame = _frames[index - 1];
+                previousRendered = _renderedFrames[index - 1];
+            }
+
+            // when saying APNGDisposeOpPrevious, we need to find the last frame not having APNGDisposeOpPrevious.
+            // Only [index-2] is not correct here since that frame may also have APNGDisposeOpPrevious.
+            if (index > 1)
+                previousPreviousRendered = _renderedFrames[_lastEffecitvePreviousPreviousFrameIndex];
+            if (_frames[index].DisposeOp != DisposeOps.APNGDisposeOpPrevious)
+                _lastEffecitvePreviousPreviousFrameIndex = Math.Max(_lastEffecitvePreviousPreviousFrameIndex, index);
 
-            var fs = nextFrame.GetBitmapSource();
             var visual = new DrawingVisual();
 
             using (var context = visual.RenderOpen())
             {
                 // protect region
-                if (nextFrame.fcTLChunk.BlendOp == BlendOps.APNGBlendOpSource)
+                if (currentFrame.BlendOp == BlendOps.APNGBlendOpSource)
                 {
                     var freeRegion = new CombinedGeometry(GeometryCombineMode.Xor,
-                        new RectangleGeometry(fullRect),
-                        new RectangleGeometry(frameRect));
+                        new RectangleGeometry(currentFrame.FrameRect),
+                        new RectangleGeometry(currentFrame.FrameRect));
                     context.PushOpacityMask(
                         new DrawingBrush(new GeometryDrawing(Brushes.Transparent, null, freeRegion)));
                 }
 
-                if (currentFrame != null && currentRenderedFrame != null)
-                    switch (currentFrame.fcTLChunk.DisposeOp)
+                if (previousFrame != null)
+                    switch (previousFrame.DisposeOp)
                     {
                         case DisposeOps.APNGDisposeOpNone:
-                            // restore currentRenderedFrame
-                            if (currentRenderedFrame != null) context.DrawImage(currentRenderedFrame, fullRect);
+                            if (previousRendered != null)
+                                context.DrawImage(previousRendered, currentFrame.FullRect);
                             break;
                         case DisposeOps.APNGDisposeOpPrevious:
-                            // restore previousStateRenderedFrame
-                            if (previousStateRenderedFrame != null)
-                                context.DrawImage(previousStateRenderedFrame, fullRect);
+                            if (previousPreviousRendered != null)
+                                context.DrawImage(previousPreviousRendered, currentFrame.FullRect);
                             break;
                         case DisposeOps.APNGDisposeOpBackground:
                             // do nothing
                             break;
                     }
 
-                // unprotect region and draw the next frame
-                if (nextFrame.fcTLChunk.BlendOp == BlendOps.APNGBlendOpSource)
+                // unprotect region and draw current frame
+                if (currentFrame.BlendOp == BlendOps.APNGBlendOpSource)
                     context.Pop();
-                context.DrawImage(fs, frameRect);
+                context.DrawImage(currentFrame.Pixels, currentFrame.FrameRect);
             }
 
             var bitmap = new RenderTargetBitmap(
-                header.Width, header.Height,
-                Math.Floor(fs.DpiX), Math.Floor(fs.DpiY),
+                (int) currentFrame.FullRect.Width, (int) currentFrame.FullRect.Height,
+                Math.Floor(currentFrame.Pixels.DpiX), Math.Floor(currentFrame.Pixels.DpiY),
                 PixelFormats.Pbgra32);
             bitmap.Render(visual);
+
+            bitmap.Freeze();
             return bitmap;
         }
+
+        private class FrameInfo
+        {
+            public readonly BlendOps BlendOp;
+            public readonly TimeSpan Delay;
+            public readonly DisposeOps DisposeOp;
+            public readonly Rect FrameRect;
+            public readonly Rect FullRect;
+            public readonly BitmapSource Pixels;
+
+            public FrameInfo(IHDRChunk header, Frame frame)
+            {
+                FullRect = new Rect(0, 0, header.Width, header.Height);
+                FrameRect = new Rect(frame.fcTLChunk.XOffset, frame.fcTLChunk.YOffset,
+                    frame.fcTLChunk.Width, frame.fcTLChunk.Height);
+
+                BlendOp = frame.fcTLChunk.BlendOp;
+                DisposeOp = frame.fcTLChunk.DisposeOp;
+
+                Pixels = frame.GetBitmapSource();
+                Pixels.Freeze();
+
+                Delay = TimeSpan.FromSeconds((double) frame.fcTLChunk.DelayNum /
+                                             (frame.fcTLChunk.DelayDen == 0
+                                                 ? 100
+                                                 : frame.fcTLChunk.DelayDen));
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/AnimatedImage.cs b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/AnimatedImage.cs
index 8a107ed..ab785a1 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/AnimatedImage.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/AnimatedImage.cs
@@ -27,9 +27,12 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
     public class AnimatedImage : Image, IDisposable
     {
         private AnimationProvider _animation;
+        private bool _disposing;
 
         public void Dispose()
         {
+            _disposing = true;
+
             BeginAnimation(AnimationFrameIndexProperty, null);
             Source = null;
 
@@ -37,15 +40,6 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
             _animation = null;
         }
 
-        private static void LoadFullImage(DependencyObject obj, DependencyPropertyChangedEventArgs ev)
-        {
-            if (!(obj is AnimatedImage instance))
-                return;
-
-            instance._animation = LoadFullImageCore((Uri) ev.NewValue, instance.Dispatcher);
-            instance.BeginAnimation(AnimationFrameIndexProperty, instance._animation.Animator);
-        }
-
         private static AnimationProvider LoadFullImageCore(Uri path, Dispatcher uiDispatcher)
         {
             byte[] sign;
@@ -55,14 +49,14 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
                 sign = reader.BaseStream.Length < 4 ? new byte[] {0, 0, 0, 0} : reader.ReadBytes(4);
             }
 
-            AnimationProvider provider = null;
+            AnimationProvider provider;
 
             if (sign[0] == 'G' && sign[1] == 'I' && sign[2] == 'F' && sign[3] == '8')
                 provider = new GifAnimationProvider(path.LocalPath, uiDispatcher);
-            //else if (sign[0] == 0x89 && sign[1] == 'P' && sign[2] == 'N' && sign[3] == 'G')
-            //    provider = new APNGAnimationProvider();
-            //else
-            //    provider = new ImageMagickProvider();
+            else if (sign[0] == 0x89 && sign[1] == 'P' && sign[2] == 'N' && sign[3] == 'G')
+                provider = new APNGAnimationProvider(path.LocalPath, uiDispatcher);
+            else
+                provider = new ImageMagickProvider(path.LocalPath, uiDispatcher);
 
             return provider;
         }
@@ -106,8 +100,9 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
             //var thumbnail = instance.Meta?.GetThumbnail(true);
             //instance.Source = thumbnail;
 
-            LoadFullImage(obj, ev);
+            instance._animation = LoadFullImageCore((Uri) ev.NewValue, instance.Dispatcher);
 
+            instance.BeginAnimation(AnimationFrameIndexProperty, instance._animation.Animator);
             instance.AnimationFrameIndex = 0;
         }
 
@@ -116,9 +111,25 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
             if (!(obj is AnimatedImage instance))
                 return;
 
-            var image = instance._animation.GetRenderedFrame((int) ev.NewValue);
-            //if (!ReferenceEquals(instance.Source, image))
-            instance.Source = image;
+            if (instance._disposing)
+                return;
+
+            var task = instance._animation.GetRenderedFrame((int) ev.NewValue);
+
+            if (instance.Source == null && (int) ev.NewValue == 0) // this is the first image. Run it synchronously.
+            {
+                task.Start();
+                task.Wait(5000);
+            }
+
+            if (task.IsCompleted)
+            {
+                instance.Source = task.Result;
+                return;
+            }
+
+            task.ContinueWith(t => { instance.Dispatcher.Invoke(() => instance.Source = t.Result); });
+            task.Start();
         }
 
         #endregion DependencyProperty
diff --git a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/AnimationProvider.cs b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/AnimationProvider.cs
index dee9104..d27dd2f 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/AnimationProvider.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/AnimationProvider.cs
@@ -16,8 +16,9 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 using System;
-using System.Windows.Media;
+using System.Threading.Tasks;
 using System.Windows.Media.Animation;
+using System.Windows.Media.Imaging;
 using System.Windows.Threading;
 
 namespace QuickLook.Plugin.ImageViewer.AnimatedImage
@@ -34,10 +35,10 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
 
         public string Path { get; }
 
-        public Int32Animation Animator { get; protected set; }
+        public Int32AnimationUsingKeyFrames Animator { get; protected set; }
 
         public abstract void Dispose();
 
-        public abstract ImageSource GetRenderedFrame(int index);
+        public abstract Task<BitmapSource> GetRenderedFrame(int index);
     }
 }
\ No newline at end of file
diff --git a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/GifAnimationProvider.cs b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/GifAnimationProvider.cs
index c8f40d9..0bf79c4 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/GifAnimationProvider.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/GifAnimationProvider.cs
@@ -17,8 +17,7 @@
 
 using System;
 using System.Drawing;
-using System.Windows;
-using System.Windows.Media;
+using System.Threading.Tasks;
 using System.Windows.Media.Animation;
 using System.Windows.Media.Imaging;
 using System.Windows.Threading;
@@ -37,10 +36,11 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
             _frame = (Bitmap) Image.FromFile(path);
             _frameSource = _frame.ToBitmapSource();
 
-            Animator = new Int32Animation(0, 1, new Duration(TimeSpan.FromMilliseconds(50)))
-            {
-                RepeatBehavior = RepeatBehavior.Forever
-            };
+            Animator = new Int32AnimationUsingKeyFrames {RepeatBehavior = RepeatBehavior.Forever};
+
+            Animator.KeyFrames.Add(new DiscreteInt32KeyFrame(0, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0))));
+            Animator.KeyFrames.Add(new DiscreteInt32KeyFrame(1, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(10))));
+            Animator.KeyFrames.Add(new DiscreteInt32KeyFrame(2, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(20))));
         }
 
         public override void Dispose()
@@ -55,7 +55,7 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
             _frameSource = null;
         }
 
-        public override ImageSource GetRenderedFrame(int index)
+        public override Task<BitmapSource> GetRenderedFrame(int index)
         {
             if (!_isPlaying)
             {
@@ -63,7 +63,7 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
                 ImageAnimator.Animate(_frame, OnFrameChanged);
             }
 
-            return _frameSource;
+            return new Task<BitmapSource>(() => _frameSource);
         }
 
         private void OnFrameChanged(object sender, EventArgs e)
@@ -72,4 +72,4 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage
             _frameSource = _frame.ToBitmapSource();
         }
     }
-}
+}
\ No newline at end of file
diff --git a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/ImageMagickProvider.cs b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/ImageMagickProvider.cs
index 85ff3a0..fb21677 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/ImageMagickProvider.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/ImageMagickProvider.cs
@@ -1,4 +1,4 @@
-// Copyright © 2017 Paddy Xu
+// Copyright © 2018 Paddy Xu
 // 
 // This file is part of QuickLook program.
 // 
@@ -16,25 +16,56 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 using System;
-using System.Windows;
+using System.Threading.Tasks;
 using System.Windows.Media.Animation;
+using System.Windows.Media.Imaging;
+using System.Windows.Threading;
 using ImageMagick;
+using QuickLook.Plugin.ImageViewer.Exiv2;
 
 namespace QuickLook.Plugin.ImageViewer.AnimatedImage
 {
-    internal class ImageMagickProvider : IAnimationProvider
+    internal class ImageMagickProvider : AnimationProvider
     {
-        public void GetAnimator(ObjectAnimationUsingKeyFrames animator, string path)
-        {
-            using (var image = new MagickImage(path))
-            {
-                image.AddProfile(ColorProfile.SRGB);
-                image.Density = new Density(Math.Floor(image.Density.X), Math.Floor(image.Density.Y));
-                image.AutoOrient();
+        private readonly string _path;
+        private readonly BitmapSource _thumbnail;
 
-                animator.KeyFrames.Add(new DiscreteObjectKeyFrame(image.ToBitmapSource(), TimeSpan.Zero));
-                animator.Duration = Duration.Forever;
-            }
+        public ImageMagickProvider(string path, Dispatcher uiDispatcher) : base(path, uiDispatcher)
+        {
+            _path = path;
+            _thumbnail = new Meta(path).GetThumbnail(true);
+
+            Animator = new Int32AnimationUsingKeyFrames();
+            Animator.KeyFrames.Add(new DiscreteInt32KeyFrame(0,
+                KeyTime.FromTimeSpan(TimeSpan.Zero))); // thumbnail/full image
+
+            if (_thumbnail != null)
+                Animator.KeyFrames.Add(new DiscreteInt32KeyFrame(1,
+                    KeyTime.FromTimeSpan(TimeSpan.FromSeconds(0.20)))); // full image
+        }
+
+        public override Task<BitmapSource> GetRenderedFrame(int index)
+        {
+            // the first image is always returns synchronously.
+            if (index == 0 && _thumbnail != null) return new Task<BitmapSource>(() => _thumbnail);
+
+            return new Task<BitmapSource>(() =>
+            {
+                using (var image = new MagickImage(_path))
+                {
+                    image.AddProfile(ColorProfile.SRGB);
+                    image.Density = new Density(Math.Floor(image.Density.X), Math.Floor(image.Density.Y));
+                    image.AutoOrient();
+
+                    var bs = image.ToBitmapSource();
+                    bs.Freeze();
+                    return bs;
+                }
+            });
+        }
+
+        public override void Dispose()
+        {
         }
     }
 }
\ No newline at end of file
diff --git a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/ImagePanel.xaml b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/ImagePanel.xaml
index 5f79c01..9bcece0 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/ImagePanel.xaml
+++ b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/ImagePanel.xaml
@@ -24,23 +24,25 @@
             <Rectangle.Style>
                 <Style>
                     <Style.Triggers>
-                        <DataTrigger Binding="{Binding ElementName=imagePanel,Path=Theme}" Value="{x:Static plugin:Themes.Dark}">
+                        <DataTrigger Binding="{Binding ElementName=imagePanel,Path=Theme}"
+                                     Value="{x:Static plugin:Themes.Dark}">
                             <Setter Property="Rectangle.Fill">
                                 <Setter.Value>
-                                    <ImageBrush AlignmentY="Top" Viewport="0,0,32,32" RenderOptions.BitmapScalingMode="NearestNeighbor"
+                                    <ImageBrush AlignmentY="Top" Viewport="0,0,32,32"
+                                                RenderOptions.BitmapScalingMode="NearestNeighbor"
                                                 ImageSource="Resources/background-b.png"
-                                                ViewportUnits="Absolute" Stretch="UniformToFill" TileMode="Tile">
-                                    </ImageBrush>
+                                                ViewportUnits="Absolute" Stretch="UniformToFill" TileMode="Tile" />
                                 </Setter.Value>
                             </Setter>
                         </DataTrigger>
-                        <DataTrigger Binding="{Binding ElementName=imagePanel,Path=Theme}" Value="{x:Static plugin:Themes.Light}">
+                        <DataTrigger Binding="{Binding ElementName=imagePanel,Path=Theme}"
+                                     Value="{x:Static plugin:Themes.Light}">
                             <Setter Property="Rectangle.Fill">
                                 <Setter.Value>
-                                    <ImageBrush AlignmentY="Top" Viewport="0,0,32,32" RenderOptions.BitmapScalingMode="NearestNeighbor"
+                                    <ImageBrush AlignmentY="Top" Viewport="0,0,32,32"
+                                                RenderOptions.BitmapScalingMode="NearestNeighbor"
                                                 ImageSource="Resources/background.png"
-                                                ViewportUnits="Absolute" Stretch="UniformToFill" TileMode="Tile">
-                                    </ImageBrush>
+                                                ViewportUnits="Absolute" Stretch="UniformToFill" TileMode="Tile" />
                                 </Setter.Value>
                             </Setter>
                         </DataTrigger>
diff --git a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/QuickLook.Plugin.ImageViewer.csproj b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/QuickLook.Plugin.ImageViewer.csproj
index eccba99..d8dbb5e 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/QuickLook.Plugin.ImageViewer.csproj
+++ b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/QuickLook.Plugin.ImageViewer.csproj
@@ -78,10 +78,10 @@
       <Link>Properties\GitVersion.cs</Link>
     </Compile>
     <Compile Include="AnimatedImage\AnimatedImage.cs" />
-    <None Include="AnimatedImage\APNGAnimationProvider.cs" />
+    <Compile Include="AnimatedImage\APNGAnimationProvider.cs" />
     <Compile Include="AnimatedImage\GifAnimationProvider.cs" />
     <Compile Include="AnimatedImage\AnimationProvider.cs" />
-    <None Include="AnimatedImage\ImageMagickProvider.cs" />
+    <Compile Include="AnimatedImage\ImageMagickProvider.cs" />
     <Compile Include="exiv2\Meta.cs" />
     <Compile Include="ImageFileHelper.cs" />
     <Compile Include="ImagePanel.xaml.cs">
diff --git a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/exiv2/Meta.cs b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/exiv2/Meta.cs
index a92d35b..44d6fba 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/exiv2/Meta.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/exiv2/Meta.cs
@@ -1,4 +1,4 @@
-// Copyright © 2017 Paddy Xu
+// Copyright © 2018 Paddy Xu
 // 
 // This file is part of QuickLook program.
 // 
@@ -83,8 +83,10 @@ namespace QuickLook.Plugin.ImageViewer.Exiv2
                         return image.ToBitmapSource();
 
                     var size = GetSize();
-                    return new TransformedBitmap(image.ToBitmapSource(),
+                    var bitmap = new TransformedBitmap(image.ToBitmapSource(),
                         new ScaleTransform(size.Width / image.Width, size.Height / image.Height));
+                    bitmap.Freeze();
+                    return bitmap;
                 }
             }
             catch (Exception)
diff --git a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/packages.config b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/packages.config
index 32ba593..6fdbf47 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/packages.config
+++ b/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/packages.config
@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
+
 <packages>
   <package id="Magick.NET-Q8-AnyCPU" version="7.4.6" targetFramework="net462" />
 </packages>
\ No newline at end of file