diff --git a/CITATION.cff b/CITATION.cff
index 79355ed..17f1fe9 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -6,7 +6,7 @@ authors:
   - family-names: "Yamasaki"
     given-names: "Taishi"
 version: 0.2.0
-date-released: 2026-06-19
+date-released: 2026-07-01
 repository-code: "https://github.com/t-yamsaki/PyQCA"
 url: "https://github.com/t-yamsaki/PyQCA"
 license: MIT