can't install zoom....

i'm trying to install zoom on my mac and when i download the software and click on it, it just gives me the following message "“Zoom.pkg” can’t be opened because Apple cannot check it for malicious software."

I've tried re-downloading the latest version from Zoom, and just did the Mac System update yesterday, but continue to get the message. is there some setting that i need to go into to allow the installation to occur?