diff --git a/graphene/__init__.py b/graphene/__init__.py
index 089d4765..5afc4f97 100644
--- a/graphene/__init__.py
+++ b/graphene/__init__.py
@@ -30,11 +30,13 @@ if not __SETUP__:
         List, NonNull,
         Enum,
         Argument,
-        Dynamic
+        Dynamic,
+        Union,
     )
     from .relay import (
         Node,
         is_node,
+        GlobalID,
         ClientIDMutation,
         Connection,
         ConnectionField,
@@ -62,9 +64,11 @@ if not __SETUP__:
         'NonNull',
         'Argument',
         'Dynamic',
+        'Union',
         'resolve_only_args',
         'Node',
         'is_node',
+        'GlobalID',
         'ClientIDMutation',
         'Connection',
         'ConnectionField',
diff --git a/graphene/relay/__init__.py b/graphene/relay/__init__.py
index 353cbf1f..8cc26ebf 100644
--- a/graphene/relay/__init__.py
+++ b/graphene/relay/__init__.py
@@ -1,10 +1,11 @@
-from .node import Node, is_node
+from .node import Node, is_node, GlobalID
 from .mutation import ClientIDMutation
 from .connection import Connection, ConnectionField, PageInfo
 
 __all__ = [
     'Node',
     'is_node',
+    'GlobalID',
     'ClientIDMutation',
     'Connection',
     'ConnectionField',
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',
+]