diff --git a/lib/builder-utils.sh b/lib/builder-utils.sh
index 5f29643..b50826f 100644
--- a/lib/builder-utils.sh
+++ b/lib/builder-utils.sh
@@ -138,32 +138,32 @@ convert_image() {
 	# Its higher so force x160 and let imagemagic decide the right wight
 	# then add transparency to the rest of the image to fit 160x160
 	log_debug "Icon Wight: $wight < Hight: $hight"
-	convert -colorspace sRGB $src -transparent white -background transparent \
+	convert $src -colorspace RGB -transparent white -background transparent \
 	    -resize x160 -size 160x160 xc:transparent +swap -gravity center \
-	    -composite -modulate 110 $dst
+	    -composite -modulate 110 png8:$dst
 	builder_check_error "converting image"
     elif [ $wight -gt $hight ] ; then
 	# Its wider so force 160x and let imagemagic decide the right hight
 	# then add transparency to the rest of the image to fit 160x160
 	log_debug "Icon Wight: $wight > Hight: $hight"
-	convert -colorspace sRGB $src -transparent white -background transparent \
+	convert $src -colorspace RGB -transparent white -background transparent \
 	    -resize 160x -size 160x160 xc:transparent +swap -gravity center \
-	    -composite -modulate 110 $dst
+	    -composite -modulate 110 png8:$dst
 	builder_check_error "converting image"
     elif [ $wight -eq $hight ] ; then
 	# Its scare so force 160x160
 	log_debug "Icon Wight: $wight = Hight: $hight"
-	convert -colorspace sRGB $src -transparent white -background transparent \
+	convert $src -colorspace RGB -transparent white -background transparent \
 	    -resize 160x160 -size 160x160 xc:transparent +swap -gravity center \
-	    -composite -modulate 110 $dst
+	    -composite -modulate 110 png8:$dst
 	builder_check_error "converting image"
     else
 	# Imagemagic is unable to detect the aspect ratio so just force 160x160
 	# this could result in streched images
 	log_debug "Icon Wight: $wight unknown Hight: $hight"
-	convert -colorspace sRGB $src -transparent white -background transparent \
+	convert $src -colorspace RGB -transparent white -background transparent \
 	    -resize 160x160 xc:transparent +swap -gravity center -composite \
-	    -modulate 110 $dst
+	    -modulate 110 png8:$dst
 	builder_check_error "converting image"
     fi