diff --git a/CHANGES.md b/CHANGES.md
index 103b249..f563361 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,4 +1,5 @@
 # CHANGELOG
+* 1 April 2024: Create a tree using the 450 nucleotides encoding the carboxyl-terminal 150 amino acids of the nucleoprotein (N450), which is highly represented on NCBI for measles. [PR #20](https://github.com/nextstrain/measles/pull/20)
 * 15 March 2024: Connect ingest and phylogenetic workflows to follow the pathogen-repo-guide by uploading ingest output to S3, downloading ingest output from S3 to phylogenetic directory, using "accession" column as the ID column, and using a color scheme that matches the new region name format. [PR #19](https://github.com/nextstrain/measles/pull/19)
 * 1 March 2024: Add phylogenetic directory to follow the pathogen-repo-guide, and update the CI workflow to match the new file structure. [PR #18](https://github.com/nextstrain/measles/pull/18)
 * 14 February 2024: Add ingest directory from pathogen-repo-guide and make measles-specific modifications. [PR #10](https://github.com/nextstrain/measles/pull/10)