diff --git a/dependency_injector/__init__.py b/dependency_injector/__init__.py
index 8f419216..b3d4203f 100644
--- a/dependency_injector/__init__.py
+++ b/dependency_injector/__init__.py
@@ -1,6 +1,6 @@
 """Dependency injector top-level package."""
 
-VERSION = '2.2.0'
+VERSION = '2.2.1'
 """Version number that follows semantic versioning.
 
 :type: str