elasticSearch/npm: Elasticdump returns a "self signed certificate" error

I am able to get the json response for the elastic search query via an http client but on trying via elasticdump it gives an error stating - self signed certificate. What is a possible solution for this?

###> elasticdump --input "https://<server_ip>/elasticsearch/_cat/indi
ces?v" --output "c:\edmp.log" --type data
Wed, 24 May 2017 03:38:07 GMT | starting dump
Wed, 24 May 2017 03:38:08 GMT | Error Emitted => self signed certificate
Wed, 24 May 2017 03:38:08 GMT | Total Writes: 0
Wed, 24 May 2017 03:38:08 GMT | dump ended with error (get phase) => Error: self
 signed certificate

And same for queried searches:

###> elasticdump  --input "https://<server_ip>/elasticsearch/_search"
 --output "c:\edmp.log" --searchbody {"query": {"filtered":{"filter":{"bool":{"m
ust":[{"range":{"timestamp":{"gte":"now-5m"}}}]}},"query":{"query_string":{"anal
yze_wildcard":true,"query":"filter:value"}}}},"size":"100","sort":[{"timestamp":{
"order":"desc","unmapped_type":"boolean"}}]} --type data
Wed, 24 May 2017 03:31:14 GMT | starting dump
Wed, 24 May 2017 03:31:15 GMT | Error Emitted => self signed certificate
Wed, 24 May 2017 03:31:15 GMT | Total Writes: 0
Wed, 24 May 2017 03:31:15 GMT | dump ended with error (get phase) => Error: self
 signed certificate

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