diff --git a/CITATION.cff b/CITATION.cff
index ceed1ac8..6a8980f5 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -15,7 +15,6 @@ authors:
     given-names: Daniel
     orcid: "https://orcid.org/0000-0001-8152-0398"
 cff-version: 1.2.0
-date-released: "2024-04-24"
 identifiers:
   - description: WfExS-backend release in Zenodo
     type: doi
@@ -28,4 +27,5 @@ message: "If you use this software, please cite it using these metadata."
 repository-code: "https://github.com/inab/WfExS-backend"
 type: software
 title: "WfExS-backend"
-version: 1.0.0a1
+version: 1.0.0a2
+date-released: "2024-07-28"
diff --git a/wfexs_backend/__init__.py b/wfexs_backend/__init__.py
index ff4e1f25..b1ebccc1 100644
--- a/wfexs_backend/__init__.py
+++ b/wfexs_backend/__init__.py
@@ -21,7 +21,7 @@
 __license__ = "Apache 2.0"
 
 # https://www.python.org/dev/peps/pep-0396/
-__version__ = "1.0.0a1"
+__version__ = "1.0.0a2"
 __url__ = "https://github.com/inab/WfExS-backend"
 __official_name__ = "WfExS-backend"