diff --git a/sqlalchemy_jsonapi/__init__.py b/sqlalchemy_jsonapi/__init__.py
index 3545260..4181484 100644
--- a/sqlalchemy_jsonapi/__init__.py
+++ b/sqlalchemy_jsonapi/__init__.py
@@ -3,6 +3,7 @@
     ALL_PERMISSIONS, INTERACTIVE_PERMISSIONS, JSONAPI, AttributeActions,
     Permissions, RelationshipActions, attr_descriptor, permission_test,
     relationship_descriptor)
+from ._version import __version__  # NOQA
 
 try:
     from .flaskext import FlaskJSONAPI
diff --git a/sqlalchemy_jsonapi/_version.py b/sqlalchemy_jsonapi/_version.py
new file mode 100644
index 0000000..f07962f
--- /dev/null
+++ b/sqlalchemy_jsonapi/_version.py
@@ -0,0 +1 @@
+__version__ = '4.0.9'