diff --git a/pack-set b/pack-set
index 4635e69..ee942cb 100755
--- a/pack-set
+++ b/pack-set
@@ -15,7 +15,7 @@ do
 
         COMMON="--peak=1000 --dither"
         SPEED_SMALL="veryslow"
-        SPEED_LARGE="slow"
+        SPEED_LARGE="veryslow"
 
         SMALL="$COMMON --size=4m --quality=0.75 --preset=$SPEED_SMALL"
         MED="$COMMON --size=10m --preset=$SPEED_SMALL"