# Building Docker

**URL:** <https://community.blockcerts.org/t/building-docker/1762>\
**Category:** Support\
**Created:** [March 5, 2019, 4:20pm UTC](https://community.blockcerts.org/t/building-docker/1762 "2019-03-05T16:20:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dericksm](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@dericksm](https://community.blockcerts.org/u/dericksm)\
**Post date:** [March 5, 2019, 4:20pm UTC](https://community.blockcerts.org/t/building-docker/1762/1 "2019-03-05T16:20:48Z")

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Hello,  
I’m following the cert-issuer Quick start but when I building the docker I get this errors:

openapi-spec-validator 0.2.6 has requirement jsonschema\<3, but you’ll have jsonschema 3.0.1 which is incompatible.  
connexion 2.2.0 has requirement jsonschema\<3.0.0,\>=2.5.1, but you’ll have jsonschema 3.0.1 which is incompatible.  
merkletools 1.0.2 has requirement pysha3==1.0b1, but you’ll have pysha3 1.0.2 which is incompatible

So when I try to issue one certificate I get the same errors reference about jsonschema. I’m running it on Windows and I didn’t find any solution till now.