# Migration problems from 2.1.7 to 2.2.1

**URL:** <https://community.gatling.io/t/migration-problems-from-2-1-7-to-2-2-1/3076>\
**Category:** Gatling (Open-Source)\
**Created:** [June 15, 2016, 12:15pm UTC](https://community.gatling.io/t/migration-problems-from-2-1-7-to-2-2-1/3076 "2016-06-15T12:15:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![slandelle](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/slandelle/32/4_2.png) [@slandelle](https://community.gatling.io/u/slandelle)\
**Post date:** [June 15, 2016, 12:15pm UTC](https://community.gatling.io/t/migration-problems-from-2-1-7-to-2-2-1/3076/1 "2016-06-15T12:15:48Z")

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Gatling 2.2 ships the new major version of AsyncHttpClient and FluentCaseInsensitiveStringsMap was dropped.