Antifragile is the second extended play by South Korean girl group Le Sserafim, released by Source Music on October 17, 2022.

[3] Through a short video clip published on September 19, Le Sserafim announced the title and release date of their upcoming extended play (EP).

[4] Source Music then shared the EP's physical release details on social media platforms.

[5] Three sets of concept photos titled "Midnight Onyx", "Iridescent Opal" and "Frozen Aquamarine" were also revealed in the weeks leading up to the release of Antifragile.

[15] On the day Antifragile was released, Le Sserafim hosted a live showcase on Mnet to introduce the extended play and to communicate with their fans.