diff --git a/graphene/__init__.py b/graphene/__init__.py
index 089d4765..5cbd2ab9 100644
--- a/graphene/__init__.py
+++ b/graphene/__init__.py
@@ -30,7 +30,8 @@ if not __SETUP__:
         List, NonNull,
         Enum,
         Argument,
-        Dynamic
+        Dynamic,
+        Union,
     )
     from .relay import (
         Node,
@@ -62,6 +63,7 @@ if not __SETUP__:
         'NonNull',
         'Argument',
         'Dynamic',
+        'Union',
         'resolve_only_args',
         'Node',
         'is_node',
diff --git a/graphene/types/__init__.py b/graphene/types/__init__.py
index c7411ff9..179c6f6d 100644
--- a/graphene/types/__init__.py
+++ b/graphene/types/__init__.py
@@ -13,6 +13,7 @@ from .inputfield import InputField
 from .argument import Argument
 from .inputobjecttype import InputObjectType
 from .dynamic import Dynamic
+from .union import Union
 
 
 __all__ = [
@@ -33,5 +34,6 @@ __all__ = [
     'Boolean',
     'List',
     'NonNull',
-    'Argument'
-    'Dynamic']
+    'Argument',
+    'Dynamic',
+]