diff --git a/pyproject.toml b/pyproject.toml
index 5e4ba4c..31267f2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,5 +39,9 @@ name = "cz_conventional_commits"
 tag_format = "$version"
 version_scheme = "pep440"
 version_provider = "pep621"
+version_files = [
+    "src/rougail/output_formatter/__version__.py",
+    "pyproject.toml:version"
+]
 update_changelog_on_bump = true
 changelog_merge_prerelease = true
diff --git a/src/rougail/output_formatter/__init__.py b/src/rougail/output_formatter/__init__.py
index fccc0a5..15015b1 100644
--- a/src/rougail/output_formatter/__init__.py
+++ b/src/rougail/output_formatter/__init__.py
@@ -38,6 +38,7 @@ from rougail.object_model import Variable, Family, Calculation, JinjaCalculation
 from rougail.utils import normalize_family
 
 from .upgrade import RougailUpgrade
+from .__version__ import __version__
 
 
 def _(text):
diff --git a/src/rougail/output_formatter/__version__.py b/src/rougail/output_formatter/__version__.py
new file mode 100644
index 0000000..9ff83cf
--- /dev/null
+++ b/src/rougail/output_formatter/__version__.py
@@ -0,0 +1 @@
+__version__ = "0.1.0a8"