diff --git a/src/com/android/wallpaper/module/DefaultWallpaperPersister.java b/src/com/android/wallpaper/module/DefaultWallpaperPersister.java
index 0060f99..bf86585 100755
--- a/src/com/android/wallpaper/module/DefaultWallpaperPersister.java
+++ b/src/com/android/wallpaper/module/DefaultWallpaperPersister.java
@@ -484,7 +484,7 @@
     private int setBitmapToWallpaperManagerCompat(Bitmap wallpaperBitmap, boolean allowBackup,
             int whichWallpaper) {
         ByteArrayOutputStream tmpOut = new ByteArrayOutputStream();
-        if (wallpaperBitmap.compress(CompressFormat.JPEG, DEFAULT_COMPRESS_QUALITY, tmpOut)) {
+        if (wallpaperBitmap.compress(CompressFormat.PNG, DEFAULT_COMPRESS_QUALITY, tmpOut)) {
             try {
                 byte[] outByteArray = tmpOut.toByteArray();
                 return mWallpaperManagerCompat.setStream(