If I claim both of my unemployed parents on my tax return as dependents, do they need to have health insurance coverage for the whole 2018 year?

I’m in a high deductible health plan offered by my employer, but my parent does not have any insurance coverage. Can I still claim the as dependents?

Will I be penalized if they don’t have any coverage or maybe only covered by a different plan than mind for a few months of the year?