# Apply license to 6.3 causes security exception
**URL:** https://discuss.elastic.co/t/apply-license-to-6-3-causes-security-exception/138436
**Category:** Elasticsearch
**Created:** [July 3, 2018, 6:09pm UTC](https://discuss.elastic.co/t/apply-license-to-6-3-causes-security-exception/138436 "2018-07-03T18:09:52Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@KeninHouston](https://discuss.elastic.co/u/KeninHouston)
#### Post date: [July 3, 2018, 6:09pm UTC](https://discuss.elastic.co/t/apply-license-to-6-3-causes-security-exception/138436/1 "2018-07-03T18:09:52Z")
Hi,
I've deployed a new ElasicSearch 6.3 cluster with Kibana. All works fine until I apply the production license to turn on the SSL features, then the cluster refuses to talk to itself and anyone. The method work fine with version 6.2.4. Is anyone aware of differences configuring the cluster for SSL in version 6.3? Do I need a new license to match version 6.3?
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### Author:  [@ikakavas](https://discuss.elastic.co/u/ikakavas)
#### Post date: [July 4, 2018, 3:09pm UTC](https://discuss.elastic.co/t/apply-license-to-6-3-causes-security-exception/138436/2 "2018-07-04T15:09:31Z")
> [@KeninHouston](#):
>
> Do I need a new license to match version 6.3?
No.
> [@KeninHouston](#):
>
> then the cluster refuses to talk to itself and anyone.
Can you please describe the behavior you are seeing and the errors that get printed in the logs ? This is a little too generic to get us going.
> [@KeninHouston](#):
>
> until I apply the production license
How do you go about doing so?
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### Author:  [@Magnus\_Kessler](https://discuss.elastic.co/u/Magnus_Kessler)
#### Post date: [July 4, 2018, 7:34pm UTC](https://discuss.elastic.co/t/apply-license-to-6-3-causes-security-exception/138436/3 "2018-07-04T19:34:39Z")
There is a known bug in Elasticsearch 6.3.0, that prevents nodes from joining the cluster when a gold or platinum license is configured. This bug will be fixed in the 6.3.1 release.
See the [warning in the documentation](https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-upgrade.html) for a workaround:
> Clusters with a Gold or Platinum license that are upgrading to 6.3 will need to explicitly set `xpack.security.enabled: true` in `elasticsearch.yml` to upgrade successfully. If this value is not set, the cluster will be unable to form after upgrade.
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### Author:  [@KeninHouston](https://discuss.elastic.co/u/KeninHouston)
#### Post date: [July 5, 2018, 3:58pm UTC](https://discuss.elastic.co/t/apply-license-to-6-3-causes-security-exception/138436/4 "2018-07-05T15:58:00Z")
Thanks to Magnus, I've now managed to get it to work. I set the xpack.security.enabled: true in elasticsearch.yml. Then after it started I had to apply the platinum license before the cluster was using TLS and Kibana could connect
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 2, 2018, 3:58pm UTC](https://discuss.elastic.co/t/apply-license-to-6-3-causes-security-exception/138436/5 "2018-08-02T15:58:03Z")
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