diff --git a/graphene/types/__init__.py b/graphene/types/__init__.py
index 680149a3..91169e38 100644
--- a/graphene/types/__init__.py
+++ b/graphene/types/__init__.py
@@ -49,4 +49,5 @@ __all__ = [
     "Union",
     "Context",
     "ResolveInfo",
+    "datetime",
 ]