diff --git a/src/dependency_injector/__init__.py b/src/dependency_injector/__init__.py
index 5d356182..6b187b5d 100644
--- a/src/dependency_injector/__init__.py
+++ b/src/dependency_injector/__init__.py
@@ -1,6 +1,6 @@
 """Dependency injector top-level package."""
 
-__version__ = '3.19.0a3'
+__version__ = '3.19.0a4'
 """Version number that follows semantic versioning.
 
 :type: str