Explicit pyqt5==5.10.1 requirement fails to install due to sip dependancy

[evereux]

System: Ubuntu Mate 20.04.1 Python: 3.8.5

Error:

ERROR: Could not find a version that satisfies the requirement sip<4.20,>=4.19.4 (from pyqt5==5.10.1->-r requirements.txt (line 1)) (from versions: 5.0.0, 5.0.1, 5.1.0, 5.1.1, 5.1.2, 5.2.0, 5.3.0, 5.4.0)
ERROR: No matching distribution found for sip<4.20,>=4.19.4 (from pyqt5==5.10.1->-r requirements.txt (line 1))

[gen2brain]

There was some PR where someone added the explicit version, just try to remove versions from requirements file.