# Gradle build error in manifest merger failed

**URL:** <https://discuss.gradle.org/t/gradle-build-error-in-manifest-merger-failed/10334>\
**Category:** Help/Discuss\
**Created:** [June 29, 2015, 9:21am UTC](https://discuss.gradle.org/t/gradle-build-error-in-manifest-merger-failed/10334 "2015-06-29T09:21:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![shuyi\_luo](https://avatars.discourse-cdn.com/v4/letter/s/e19adc/32.png) [@shuyi\_luo](https://discuss.gradle.org/u/shuyi_luo)\
**Post date:** [June 29, 2015, 9:21am UTC](https://discuss.gradle.org/t/gradle-build-error-in-manifest-merger-failed/10334/1 "2015-06-29T09:21:32Z")

</div>

When I try to build my code, it failed with following exception log:

Manifest merger failed: uses-sdk:minSdkVersion 21 cannot be **different** than version L declared in library /\*\*\*/\*\*\*/AndroidManifest.xml

Please help me to find the root cause.  
Thank you.