Conection timeout error when installing mlxtend from github on google colab

Question

That's my question too. When I want to install mlxtend from github I got this error: this is my code on google colab:

!pip install git+git://github.com/rasbt/mlxtend.git

and I got this error:

Collecting git+git://github.com/rasbt/mlxtend.git
  Cloning git://github.com/rasbt/mlxtend.git to /tmp/pip-req-build-4jwtt0vm
  Running command git clone -q git://github.com/rasbt/mlxtend.git /tmp/pip-req-build-4jwtt0vm
  fatal: unable to connect to github.com:
  github.com[0: 140.82.113.3]: errno=Connection timed out

WARNING: Discarding git+git://github.com/rasbt/mlxtend.git. Command errored out with exit status 128: git clone -q git://github.com/rasbt/mlxtend.git /tmp/pip-req-build-4jwtt0vm Check the logs for full command output.
ERROR: Command errored out with exit status 128: git clone -q git://github.com/rasbt/mlxtend.git /tmp/pip-req-build-4jwtt0vm Check the logs for full command output.

Please help me how can I fix this error. (I mean connection time out)

I tried updating pip and installing mlxtend and did not succeed.