# Client library compatibility

**URL:** <https://discuss.elastic.co/t/client-library-compatibility/63060>\
**Category:** Elasticsearch\
**Created:** [October 14, 2016, 1:41pm UTC](https://discuss.elastic.co/t/client-library-compatibility/63060 "2016-10-14T13:41:03Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![fmachi](https://avatars.discourse-cdn.com/v4/letter/f/c37758/32.png) [@fmachi](https://discuss.elastic.co/u/fmachi)\
**Post date:** [October 14, 2016, 1:41pm UTC](https://discuss.elastic.co/t/client-library-compatibility/63060/1 "2016-10-14T13:41:03Z")

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Hi all,  
is there any place where I can found which elasticsearch server versions could be used with the client version 0.9?  
We have an old application using ES 0.9 with the proper client library (0.9 version) and we would like to upgrade the elasticsearch server without upgrading soon the client library (if possible).  
Thanks  
Filippo

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [October 14, 2016, 1:57pm UTC](https://discuss.elastic.co/t/client-library-compatibility/63060/2 "2016-10-14T13:57:42Z")

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If you are talking about elasticsearch official Java JAR, no you can't do that.  
Is that what you are talking about?

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**Author:** ![fmachi](https://avatars.discourse-cdn.com/v4/letter/f/c37758/32.png) [@fmachi](https://discuss.elastic.co/u/fmachi)\
**Post date:** [October 14, 2016, 4:36pm UTC](https://discuss.elastic.co/t/client-library-compatibility/63060/3 "2016-10-14T16:36:14Z")

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Thanks for your answer, I'm talking about the client I can find in this artifact:

```
 <dependency>
        <groupId>org.elasticsearch</groupId>
        <artifactId>elasticsearch</artifactId>
        <version>0.90.2</version>
    </dependency>
```

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [October 14, 2016, 5:02pm UTC](https://discuss.elastic.co/t/client-library-compatibility/63060/4 "2016-10-14T17:02:19Z")

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I confirm that you must update both client and server.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 10:12pm UTC](https://discuss.elastic.co/t/client-library-compatibility/63060/5 "2017-07-05T22:12:11Z")

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