It’s not just you. As you age, it gets harder to remember the digits of a phone number, or calculate how much tip to leave without resorting to an app. Our so-called “working memory” is responsible for keeping this kind of information at the forefront of the mind. And it fades with age.

Now researchers have found that stimulating the brain with weak electrical currents can restore working memory in older adults. The discovery lays the groundwork for combating memory decline with age, the