# how to fix pysha3 error

**URL:** <https://community.blockcerts.org/t/how-to-fix-pysha3-error/1754>\
**Category:** Technical\
**Created:** [March 4, 2019, 2:11pm UTC](https://community.blockcerts.org/t/how-to-fix-pysha3-error/1754 "2019-03-04T14:11:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![twaqhaa](https://avatars.discourse-cdn.com/v4/letter/t/48db29/32.png) [@twaqhaa](https://community.blockcerts.org/u/twaqhaa)\
**Post date:** [March 4, 2019, 2:11pm UTC](https://community.blockcerts.org/t/how-to-fix-pysha3-error/1754/1 "2019-03-04T14:11:18Z")

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I tried to solve the error, but the problem still exists.  
This is the code of error:  
Installed /home/hanaa/environments/project\_home/cert-issuer/my\_env/lib/python3.6/site-packages/cert\_issuer-2.0.15-py3.6.egg  
Processing dependencies for cert-issuer==2.0.15  
error: pysha3 1.0.2 is installed but pysha3==1.0b1 is required by {‘merkletools’}

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**Author:** ![twaqhaa](https://avatars.discourse-cdn.com/v4/letter/t/48db29/32.png) [@twaqhaa](https://community.blockcerts.org/u/twaqhaa)\
**Post date:** [March 4, 2019, 4:35pm UTC](https://community.blockcerts.org/t/how-to-fix-pysha3-error/1754/2 "2019-03-04T16:35:55Z")

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pkg\_resources.ContextualVersionConflict: (pysha3 1.0.2 (/home/hanaa/environments/project\_home/cert-issuer/my\_env/lib/python3.6/site-packages/pysha3-1.0.2-py3.6-linux-x86\_64.egg), Requirement.parse(‘pysha3==1.0b1’), {‘merkletools’})

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**Author:** ![Systemoutprintln](https://avatars.discourse-cdn.com/v4/letter/s/aeb1de/32.png) [@Systemoutprintln](https://community.blockcerts.org/u/Systemoutprintln)\
**Post date:** [March 7, 2019, 5:47pm UTC](https://community.blockcerts.org/t/how-to-fix-pysha3-error/1754/3 "2019-03-07T17:47:58Z")

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Change merkletools requirements.

[Reference](https://community.blockcerts.org/t/merkletools-pysha-dependency-conflict/1107/5)