diff --git a/CITATION.cff b/CITATION.cff
index f7c1cef..6f25e89 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -14,3 +14,4 @@ authors:
     orcid: 'https://orcid.org/0009-0001-7622-1446'
 repository-code: 'https://github.com/ethanholz/sonic-pdb-parser'
 license: MIT
+date-released: '2024-05-31'