It is investing £2m in an ad campaign created by Mortimer Whittaker O'Sullivan to promote the redesign, which was handled by Reach.
The packaging, which launches in January, differentiates the various flavours through colour-coding and introduces a grain-shaped logo. Information on the front of the packs will reaffirm Ryvita's health message.
The design highlights the nutritional benefits of Ryvita, with a tick-box device emphasising the low-fat snack's healthy ingredients and low calorie content.
The relaunch of the core range follows a year of extensive new product development by the Associated British Foods-owned brand, including the launch of Ryvita Goodness cereal bars (Marketing, 19 October).
Ryvita grew its sales by 15% year on year to between £15m and £20m, according to this year's Marketing/TNS Biggest Brands survey. It last overhauled the packaging for its core crispbread range in 2002.