fix ethereum to 2.3.1
@ -2,7 +2,7 @@ configparser>=3.5.0
coverage
eth_abi>=1.0.0
eth-account>=0.1.0a2
ethereum>=2.3.0
ethereum==2.3.1
eth-hash>=0.1.0
eth-keyfile>=0.5.1
eth-keys>=0.2.0b3
@ -305,7 +305,7 @@ setup(
packages=find_packages(exclude=['contrib', 'docs', 'tests']),
install_requires=[
'ethereum>=2.3.0',
'ethereum==2.3.1',
'z3-solver>=4.5',
'requests',
'py-solc',