# Java dependencies

**URL:** https://discuss.ray.io/t/java-dependencies/3884
**Category:** Ray Core
**Created:** [October 21, 2021, 1:18am UTC](https://discuss.ray.io/t/java-dependencies/3884 "2021-10-21T01:18:09Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![raghukiran](https://avatars.discourse-cdn.com/v4/letter/r/e68b1a/32.png) [@raghukiran](https://discuss.ray.io/u/raghukiran)
#### Post date: [October 21, 2021, 1:18am UTC](https://discuss.ray.io/t/java-dependencies/3884/1 "2021-10-21T01:18:09Z")

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`ray-dist.jar` packages `jackson-core` and since a JAR of mine depends on `jackson-databind` and `jackson-annotations`, there is a conflict in the versions. This is causing exceptions.

It is not obvious which version of jackson Ray is using and how I can fix this issue.

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### Author: ![jovany-wang](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ray.io/jovany-wang/32/364_2.png) [@jovany-wang](https://discuss.ray.io/u/jovany-wang)
#### Post date: [October 26, 2021, 4:37pm UTC](https://discuss.ray.io/t/java-dependencies/3884/2 "2021-10-26T16:37:30Z")

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> [@raghukiran](#):
>
> `jackson-annotations` , t

Could you upgrade your dependency jackson? I believe it can address your issue.