diff --git a/update.sh b/update.sh
index 080919e..3357d5e 100755
--- a/update.sh
+++ b/update.sh
@@ -24,6 +24,6 @@ EOT
 		echo "=== $REMOTE:$PORT ($DIR) ==="
 		rsync -a root/Makefile "$REMOTE:$DIR" &&
 		rsync -a $RSYNCOPT $DIRS "$REMOTE:$DIR" &&
-		ssh -p $PORT $REMOTE make -C "$DIR" data.cdb
+		ssh -p $PORT $REMOTE make -B -C "$DIR" data.cdb
 	) < /dev/null
 done