diff --git a/CHANGELOG.md b/CHANGELOG.md
index 893ccb6..63be683 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 0.1.0a11 (2025-09-29)
+
+### Feat
+
+- default value for a calculated variable with an unknown optional variable
+- update tests for integer type
+
 ## 0.1.0a10 (2025-09-22)
 
 ### Fix
diff --git a/pyproject.toml b/pyproject.toml
index 0ebe728..2d8ea69 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ requires = ["flit_core >=3.8.0,<4"]
 
 [project]
 name = "rougail.user_data_environment"
-version = "0.1.0a10"
+version = "0.1.0a11"
 authors = [{name = "Emmanuel Garette", email = "gnunux@gnunux.info"}]
 readme = "README.md"
 description = "Rougail user_data environment"
diff --git a/src/rougail/user_data_environment/__version__.py b/src/rougail/user_data_environment/__version__.py
index e500519..160d7f0 100644
--- a/src/rougail/user_data_environment/__version__.py
+++ b/src/rougail/user_data_environment/__version__.py
@@ -1 +1 @@
-__version__ = "0.1.0a10"
+__version__ = "0.1.0a11"