Stock up on Forever stamps now, or forever hold your peace.

The United States Postal Service’s plan to raise stamp prices is taking effect on July 10. The price of a Forever stamp will rise from 58 cents to 60 cents.

A Forever stamp, as its name suggests, can be used to mail a letter regardless of when it was purchased. That means if you bought a book of Forever stamps 10 years ago, when the price was 45 cents each, you can still use them to mail letters now, even though prices have climbed.

USPS Product Current cost Cost after July 10
Letters (1 oz.) 58 cents 60 cents
Letters (metered 1 oz.) 53 cents 57 cents
Letters (additional ounces) 20 cents 24 cents
Domestic postcards 40 cents 44 cents
International letters (1 oz.) $1.30 $1.40

The price hike, which raises the cost of First-Class Mail by 6.5%, is still lower than high inflation rates, the Postal Service said. The cost of all goods is up 8.6% over the past year, according to the Bureau of Labor Statistics.