# Error installing cert-issuer on ethereum

**URL:** <https://community.blockcerts.org/t/error-installing-cert-issuer-on-ethereum/1091>\
**Category:** Technical\
**Created:** [June 6, 2018, 3:34pm UTC](https://community.blockcerts.org/t/error-installing-cert-issuer-on-ethereum/1091 "2018-06-06T15:34:51Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![aronning](https://avatars.discourse-cdn.com/v4/letter/a/47e85d/32.png) [@aronning](https://community.blockcerts.org/u/aronning)\
**Post date:** [June 12, 2018, 4:33pm UTC](https://community.blockcerts.org/t/error-installing-cert-issuer-on-ethereum/1091/4 "2018-06-12T16:33:36Z")

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While I’m not familiar with this exact error, I do see a reference to pysha3 in the red error log. I’ve had problems with this as well due to conflicting package dependencies.

The dockerfile handles this dependency conflict, and locally I’ve had to do a little digging myself to handle it. Check out this [link](https://community.blockcerts.org/t/merkletools-dependences-pysha3/649/4) for more info on it, I hope it solves your problem but if not let me know.

Quote from that link:

> [@Merkletools dependences pysha3](https://community.blockcerts.org/t/merkletools-dependences-pysha3/649/4):
>
> `vi /usr/local/lib/python3.6/site-packages/chainpoint-0.0.2.dist-info/METADATA`
> 
> Change to `merkletools (==1.0.2)` to `merkletools (>=1.0.3)`

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_[View the full topic](https://community.blockcerts.org/t/error-installing-cert-issuer-on-ethereum/1091)._