pandas external documentation in PyCharm

Hello,

I noticed that pandas external documentation link is not set up under File\settings\Python External Documentation

Other packages, like numpy and scipy, have links.

Do you know how to set it up?

Many thanks,

Panos

2018.1.4 (Professional Edition)
Build #PY-181.5087.37, built on May 24, 2018
Licensed to PyCharm Evaluator
Expiration date: August 14, 2018
JRE: 1.8.0_152-release-1136-b39 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows Server 2016 10.0()