Nike Inc.’s e-commerce site and its mobile apps came back online early this afternoon after being down for nearly a day for maintenance.

Nike, No. 61 in the Internet Retailer 2015 Top 500 Guide, announced Tuesday evening on Twitter that it would take down its website to make unspecified improvements. Twitter users repeatedly asked the store’s official Twitter account, @nikestore, when the site would be back up and running. The company replied that it planned to be back online at some point Wednesday.

On Wednesday, visitors to Nike.com were greeted with a standard message in a number of languages under the banner “We’re making Nike.com better.” Nike’s message to consumers read: “It’s what you do off the field that makes you better. We are improving your experience and will be back in the game the afternoon of July 29th in the US, the evening of July 29th across Europe and morning of July 30th in Asia.” In fact, the site was up and running by early afternoon in North America.

Shoppers took to Twitter to express dismay about the site being down, with some wondering what kinds of changes are in store. Nike issued a statement on Wednesday afternoon reading: “Nike is continually working to create better online shopping experiences for our consumers. To deliver the most premium experiences, we perform regular technology upgrades.” 

On Nike’s Q4 2015 earnings call to recap the 2015 fiscal year, Nike CEO Mark Parker told analysts the company’s e-commerce sales were over $1 billion for the first time ever. That’s in line with Top500Guide.com data, which shows Nike’s sales growing at a compound annual growth rate of 31.06% based on Internet Retailer estimates from 2010-14.