diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3216b95..aa5a165 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+## v1.2.1 (2022-12-22)
+
+### Refactor
+
+- **parser**: Update help message for substitution argument
+- **parser**: Rename argument to substitutions
+- Rename parameters in subsitution utils
+- Rename function to create substition definition
+
 ## v1.2.0 (2022-11-28)
 
 ### Feat
diff --git a/pyproject.toml b/pyproject.toml
index d1cba03..aa5d9b1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "varst"
-version = "1.2.0"
+version = "1.2.1"
 description = "Replace substitutions in rst files with variables."
 authors = ["Jeonghun-Ban <junghoon.ban@gmail.com>"]
 maintainers = ["Jeonghun-Ban <junghoon.ban@gmail.com>"]
@@ -50,7 +50,7 @@ requires = [
 [tool]
 [tool.commitizen]
 name = "cz_conventional_commits"
-version = "1.2.0"
+version = "1.2.1"
 tag_format = "v$version"
 version_files = [
     "pyproject.toml:version",