Do I need add dependency if the app is having two simple Service Portal pages?

[GuruprasadB]

Hi All,
We have an app, that was having two basic pages in CMS previously. Now as CMS is deprecated, we have migrated the pages to Service Portal Pages. These pages are simple guides like: (1) About the App (2) How to use the App.

Previously when we were using CMS, we had mentioned CMS as the dependency in the app's dependency list.

Now I am wonder as we are using Service Portal now, whether we should add something as a dependency , and if yes - does adding "Service Portal core" is the correct one?

I am thinking I need to add some dependency for Service Portal, because Service Portal is relatively new and may not be available in really old versions of ServiceNow. In order to prevent the latest version of our app being installed in the very old version of ServiceNow (if someone is still having), and later it being broken for the customer, adding an appropriate dependency for Service Portal maybe the best way to prevent installation in old unsupported versions.

[GuruprasadB]

I attached an image in the above question to highlight the possible available dependencies for Service Portal.
To me it looks like putting "Service Portal - Core" is sufficient for usage of only "Service Portal Page"