Correction to: Nature Reviews Chemistry https://doi.org/10.1038/s41570-025-00697-4, published online 14 February 2025.

In the version of this article initially published, the reference cited at the end of the sentence “Around ten related approaches to the production of phage displayed libraries of T2S-cyclic peptides have been reviewed recently” was incorrect; the citation has now been amended to Hampton, J.T. & Liu, W.R. Diversification of phage-displayed peptide libraries with noncanonical amino acid mutagenesis and chemical modification. Chem. Rev. 124, 6051–6077 (2024) in the HTML and PDF versions of the article.