diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8a1b580..923cf29 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -57,8 +57,9 @@ version=$(poetry version -s)
 
 sed "s/$prev_version/$version/g" -i README.rst
 sed "s/$prev_version/$version/g" -i docs/index.rst
+sed "s/$prev_version/$version/g" -i anytree/__init__.py
 
-git commit -m"version bump to ${version}" pyproject.toml README.rst docs/index.rst
+git commit -m"version bump to ${version}" pyproject.toml README.rst docs/index.rst anytree/__init__.py
 git tag "${version}" -m "Release ${version}"
 git push
 git push --tags
diff --git a/anytree/__init__.py b/anytree/__init__.py
index 8905cdf..2eb64d3 100644
--- a/anytree/__init__.py
+++ b/anytree/__init__.py
@@ -2,7 +2,7 @@
 
 """Powerful and Lightweight Python Tree Data Structure."""
 
-__version__ = "2.9.0"
+__version__ = "2.12.0"
 __author__ = "c0fec0de"
 __author_email__ = "c0fec0de@gmail.com"
 __description__ = """Powerful and Lightweight Python Tree Data Structure.."""