Odoo version 15 pip error

if you get error when running pip install -r requirements.txt as below

thon38\Include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30133\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\cppwinrt" /Tcbuild\temp.win-amd64-cpython-38\Release\_openssl.c /Fobuild\temp.win-amd64-cpython-38\Release\build\temp.win-amd64-cpython-38\Release\_openssl.obj
      _openssl.c
      build\temp.win-amd64-cpython-38\Release\_openssl.c(575): fatal error C1083: Cannot open include file: 'openssl/opensslv.h': No such file or directory        
      error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC\\14.29.30133\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for cryptography
Failed to build cryptography
ERROR: Could not build wheels for cryptography, which is required to install pyproject.toml-based projects

try changing the line as below

cryptography==36.0.1 

it will resolve the issue