diff --git a/erddapy/array_like/datasets.py b/erddapy/array_like/datasets.py
index 9b546bc3..6089da3c 100644
--- a/erddapy/array_like/datasets.py
+++ b/erddapy/array_like/datasets.py
@@ -1,5 +1,7 @@
 """Classes to represent ERDDAP datasets."""
 
+from __future__ import annotations
+
 from pathlib import Path
 from typing import Union
 
diff --git a/erddapy/array_like/server.py b/erddapy/array_like/server.py
index a8e6b522..bb18807d 100644
--- a/erddapy/array_like/server.py
+++ b/erddapy/array_like/server.py
@@ -1,5 +1,7 @@
 """Class ERDDAPServer to represent an ERDDAP server connection."""
 
+from __future__ import annotations
+
 from erddapy.array_like.connection import ERDDAPConnection
 from erddapy.array_like.datasets import ERDDAPDataset