diff --git a/CITATION.cff b/CITATION.cff
index 811677b..9f4bb00 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -27,5 +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: 1.0.0b0
+version: 1.0.0b1
 date-released: "2024-08-07"
diff --git a/wfexs_backend/__init__.py b/wfexs_backend/__init__.py
index f15da79..e26a8b3 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__ = "1.0.0b0"
+__version__ = "1.0.0b1"
 __url__ = "https://github.com/inab/WfExS-backend"
 __official_name__ = "WfExS-backend"