diff --git a/prebuilt/common/bootanimation/halfres/240.zip b/prebuilt/common/bootanimation/halfres/240.zip
index 8ae2a4d..59735d0 100644
--- a/prebuilt/common/bootanimation/halfres/240.zip
+++ b/prebuilt/common/bootanimation/halfres/240.zip
Binary files differ
diff --git a/prebuilt/common/bootanimation/halfres/320.zip b/prebuilt/common/bootanimation/halfres/320.zip
index 2ec2f73..7497da0 100644
--- a/prebuilt/common/bootanimation/halfres/320.zip
+++ b/prebuilt/common/bootanimation/halfres/320.zip
Binary files differ
diff --git a/prebuilt/common/bootanimation/halfres/360.zip b/prebuilt/common/bootanimation/halfres/360.zip
index 31ea394..f1247f7 100644
--- a/prebuilt/common/bootanimation/halfres/360.zip
+++ b/prebuilt/common/bootanimation/halfres/360.zip
Binary files differ
diff --git a/prebuilt/common/bootanimation/halfres/540.zip b/prebuilt/common/bootanimation/halfres/540.zip
index 0e77fb5..35b631c 100644
--- a/prebuilt/common/bootanimation/halfres/540.zip
+++ b/prebuilt/common/bootanimation/halfres/540.zip
Binary files differ
diff --git a/prebuilt/common/bootanimation/halfres/600.zip b/prebuilt/common/bootanimation/halfres/600.zip
index 82f3d71..ec352f7 100644
--- a/prebuilt/common/bootanimation/halfres/600.zip
+++ b/prebuilt/common/bootanimation/halfres/600.zip
Binary files differ
diff --git a/prebuilt/common/bootanimation/halfres/768.zip b/prebuilt/common/bootanimation/halfres/768.zip
index 131c7d2..f87e834 100644
--- a/prebuilt/common/bootanimation/halfres/768.zip
+++ b/prebuilt/common/bootanimation/halfres/768.zip
Binary files differ
diff --git a/prebuilt/common/bootanimation/halfres/800.zip b/prebuilt/common/bootanimation/halfres/800.zip
index 1710801..051db72 100644
--- a/prebuilt/common/bootanimation/halfres/800.zip
+++ b/prebuilt/common/bootanimation/halfres/800.zip
Binary files differ
diff --git a/prebuilt/common/bootanimation/halfres/generate-half-res-anims.sh b/prebuilt/common/bootanimation/halfres/generate-half-res-anims.sh
index e50ec60..70f6fad 100755
--- a/prebuilt/common/bootanimation/halfres/generate-half-res-anims.sh
+++ b/prebuilt/common/bootanimation/halfres/generate-half-res-anims.sh
@@ -14,9 +14,9 @@
 		unzip ../../$i.zip desc.txt
 	else
 		unzip ../../$i.zip
-		for j in */*.jpg; do
-			convert $j -resize 50% tmp.jpg
-			mv tmp.jpg $j
+		for j in */*.[pP][nN][gG]; do
+			convert $j -resize 50% tmp.png
+			mv tmp.png $j
 		done
 	fi
 	zip -r0 ../$i.zip .