The Microsoft Office icons are getting a modern makeover.

On Thursday, Microsoft previewed the new look, which swaps out the flat-design for thicker, 3D-looking symbols.

The last time the company refreshed the icons was five years ago with the release of Office 2013. Since then, Microsoft has focused on making the software suite an internet-connected cloud service that works on smartphones and tablets, in addition to PCs. On top of this, the tech giant has also been infusing Office with more AI-powered search and suggestion features.

"As a signal to our customers, we've evolved our Office icons to reflect these significant product changes," Jon Friedman, head of Microsoft Office design wrote in a blog post.

To us, the new icons look a bit like plastic buttons. The symbols have also been tweaked with brighter and deeper colors. The letter representing each Office program has also been downsized.

The new icons will start rolling out across Office in the coming months, starting with the mobile and web versions of the software. The redesign will first apply to programs such as Microsoft Word, Excel, PowerPoint, OneDrive, Outlook and Skype, among a few others.

"Stay tuned, this is the beginning of a cross-company effort to update all icons in the same style," Friedman wrote in the comment section to his blog post.

"We are in the process of getting these icons into all formats needed to scale across products and sizes. We've tested them across all contexts (on black, white and color tiles) at many different sizes," he added.

The new icons will join other redesigns that've recently come to Office. In June, Microsoft previewed some of them, including a simplified-look for the "ribbon" on Microsoft Word, which appears at the top of program window and contains all the different functions.