Remove ignore_above default mapping from logstash instead of changing it to each index from elastic search

Hello,

I am having some multiple indexes and logs are being filtered in logstash and sending to elastic search and kibana, when I see in elastic searching mapping some text/keyword fields but with additional property of ignore_above:256, Is there any way to set this to higher value from logstash itself instead of changing it during index creation time, so that existing indexes will be replaced

Thanks.