Amazon is making it cheaper to qualify for free shipping.
This is the second time in three months that Amazon has lowered its free shipping threshold.
The second drop comes after Walmart's launch of new discount for customers who ship purchases to one of the retailer's stores, instead of to a home or elsewhere. The discount knocks as much as $50 off purchases of larger items like televisions.
Amazon is likely hoping that the cheaper free shipping threshold makes it better able to compete with Walmart for non-Prime members.
See the best-selling books on Amazon of 2017:
But Walmart is still the better deal for those customers because it's offering all shoppers free two-day delivery — something Amazon offers only to Prime members.
"Although non-Prime members can now avoid shipping fees, they will still have to wait for up to a week for their packages to arrive," said Sarah Engel, the senior vice president of global marketing for the retail analytics firm DynamicAction. "The fact that Amazon didn't outright match Wal-mart's free shipping timeline shows their continued commitment to the recurring revenue Prime model."
Amazon Prime members pay $99 annually for free two-day shipping and a host of other services like unlimited streaming of movies and music. Prime members don't have to spend a minimum to qualify for free shipping.
Walmart has been investing heavily in ecommerce, but it has a long way to go before it catches up with Amazon.
Walmart's online sales were $13.7 billion in 2015, compared with Amazon's $107 billion. Walmart is still far ahead in terms of overall sales, however.
Walmart generated $486 billion in fiscal 2016, which is more than three times as much as Amazon's revenue of $136 billion.
Walmart is trying to crush Amazon with better deals — here's who's winning the price war
We tried the infamous taco bowl at Trump Grill — here's what it's like
A 14-year-old girl who became famous overnight is feuding with Walmart