Cannot install apache-airflow 2.1.4

In attempting to install apache-airflow 2.1.4 with pipenv, I am getting dependency problems:

ERROR: Could not find a version that matches markupsafe<2.0,>=1.1.1,>=2.0 (from apache-airflow==2.1.4->-r C:\Users\dblair\AppData\Local\Temp\pipenvun5j6y2crequirements\pipenv-705n7jjz-constraints.txt (line 2))
Tried: 0.9, 0.9.1, 0.9.2, 0.9.3, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 1.0, 1.1.0, 1.1.1, 1.1.1, 2.0.0, 2.0.0, 2.0.1, 2.0.1
Skipped pre-versions: 2.0.0a1, 2.0.0a1, 2.0.0rc1, 2.0.0rc1, 2.0.0rc2, 2.0.0rc2
There are incompatible versions in the resolved dependencies:
markupsafe<2.0,>=1.1.1 (from apache-airflow==2.1.4->-r C:\Users\dblair\AppData\Local\Temp\pipenvun5j6y2crequirements\pipenv-705n7jjz-constraints.txt (line 2))
markupsafe>=2.0 (from jinja2==3.0.3->apache-airflow==2.1.4->-r C:\Users\dblair\AppData\Local\Temp\pipenvun5j6y2crequirements\pipenv-705n7jjz-constraints.txt (line 2))

Can you please advise.
Thanks,
Dustin