diff --git a/docs/examples/fastapi-sqlalchemy.rst b/docs/examples/fastapi-sqlalchemy.rst
index 5db1cf8f..653fd50f 100644
--- a/docs/examples/fastapi-sqlalchemy.rst
+++ b/docs/examples/fastapi-sqlalchemy.rst
@@ -94,7 +94,7 @@ Module ``models`` contains example SQLAlchemy user model. See ``webapp/models.py
    :language: python
 
 Database
------
+--------
 
 Module ``database`` defines declarative base and utility class with engine and session factory.
 See ``webapp/database.py``:
diff --git a/docs/main/changelog.rst b/docs/main/changelog.rst
index 451d5e34..5c038ad3 100644
--- a/docs/main/changelog.rst
+++ b/docs/main/changelog.rst
@@ -7,6 +7,11 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
+4.22.1
+------
+- Pin ``sphinx`` version to hotfix docs build.
+- Fix a typo in docs.
+
 4.22.0
 ------
 - Add method ``container.check_dependencies()`` to check if all container dependencies
diff --git a/requirements-doc.txt b/requirements-doc.txt
index f0fdcb40..a390c915 100644
--- a/requirements-doc.txt
+++ b/requirements-doc.txt
@@ -1,4 +1,5 @@
-sphinx
+# TODO: unpin 3.5.0 when this bug is fixed: https://github.com/sphinx-doc/sphinx/issues/8885
+sphinx<3.5.0
 -e git://github.com/rmk135/sphinxcontrib-disqus.git#egg=sphinxcontrib-disqus
 
 -r requirements-ext.txt
diff --git a/src/dependency_injector/__init__.py b/src/dependency_injector/__init__.py
index 34f1ecd3..8f180863 100644
--- a/src/dependency_injector/__init__.py
+++ b/src/dependency_injector/__init__.py
@@ -1,6 +1,6 @@
 """Top-level package."""
 
-__version__ = '4.22.0'
+__version__ = '4.22.1'
 """Version number.
 
 :type: str