diff --git a/CHANGELOG.md b/CHANGELOG.md
index 856a5b83c..88fb75f4c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## 1.2.0a21 (2025-05-02)
+
+### Fix
+
+- support {{ suffix }} name in 1.1 format version
+- do not force use_data usage
+- validators for an index
+
 ## 1.2.0a20 (2025-04-30)
 
 ### Fix
diff --git a/pyproject.toml b/pyproject.toml
index 2843e040c..a9a02110e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ requires = ["flit_core >=3.8.0,<4"]
 
 [project]
 name = "rougail"
-version = "1.2.0a20"
+version = "1.2.0a21"
 authors = [{name = "Emmanuel Garette", email = "gnunux@gnunux.info"}]
 readme = "README.md"
 description = "A consistency handling system that was initially designed in the configuration management"
diff --git a/src/rougail/__version__.py b/src/rougail/__version__.py
index c887dd39d..b7c7c9216 100644
--- a/src/rougail/__version__.py
+++ b/src/rougail/__version__.py
@@ -1 +1 @@
-__version__ = "1.2.0a20"
+__version__ = "1.2.0a21"