diff --git a/google/cloud/datastore/client.py b/google/cloud/datastore/client.py
index eba90c5e..7dd286d3 100644
--- a/google/cloud/datastore/client.py
+++ b/google/cloud/datastore/client.py
@@ -239,7 +239,10 @@ def __init__(
         _use_grpc=None,
     ):
         super(Client, self).__init__(
-            project=project, credentials=credentials, _http=_http
+            project=project,
+            credentials=credentials,
+            client_options=client_options,
+            _http=_http,
         )
         self.namespace = namespace
         self._client_info = client_info
diff --git a/setup.py b/setup.py
index 96377b93..f19ccbb8 100644
--- a/setup.py
+++ b/setup.py
@@ -30,7 +30,7 @@
 release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     "google-api-core[grpc] >= 1.14.0, < 2.0.0dev",
-    "google-cloud-core >= 1.0.3, < 2.0dev",
+    "google-cloud-core >= 1.4.0, < 2.0dev",
 ]
 extras = {}