Loosen `jinja2` requirement to include v3.
@@ -22,7 +22,7 @@ INSTALL_REQUIRES = (
'paramiko>=2.7,<3', # 2.7 (2019) adds OpenSSH key format + Match SSH config
'click>2',
'colorama<1', # Windows color support for click
- 'jinja2>2,<3',
+ 'jinja2>2,<4',
'python-dateutil>2,<3',
'six>1,<2',
'setuptools',
