diff --git a/cloudkitty/storage/v2/elasticsearch/client.py b/cloudkitty/storage/v2/elasticsearch/client.py
index 7716f039..01bdb500 100644
--- a/cloudkitty/storage/v2/elasticsearch/client.py
+++ b/cloudkitty/storage/v2/elasticsearch/client.py
@@ -76,6 +76,9 @@ def _build_must(start, end, metric_types, filters):
             must.append({'term': {'type': filters['type']}})
 
         if metric_types:
+            if type(metric_types) is not list:
+                metric_types = [metric_types]
+
             must.append({"terms": {"type": metric_types}})
 
         return must
diff --git a/cloudkitty/storage/v2/opensearch/client.py b/cloudkitty/storage/v2/opensearch/client.py
index d5757c9b..e15bf77e 100644
--- a/cloudkitty/storage/v2/opensearch/client.py
+++ b/cloudkitty/storage/v2/opensearch/client.py
@@ -76,6 +76,9 @@ def _build_must(start, end, metric_types, filters):
             must.append({'term': {'type': filters['type']}})
 
         if metric_types:
+            if type(metric_types) is not list:
+                metric_types = [metric_types]
+
             must.append({"terms": {"type": metric_types}})
 
         return must
diff --git a/cloudkitty/tests/storage/v2/elasticsearch/test_client.py b/cloudkitty/tests/storage/v2/elasticsearch/test_client.py
index 5d3158b4..c3493574 100644
--- a/cloudkitty/tests/storage/v2/elasticsearch/test_client.py
+++ b/cloudkitty/tests/storage/v2/elasticsearch/test_client.py
@@ -53,6 +53,13 @@ def test_build_must_with_filters(self):
             [{'term': {'type': 'awesome'}}],
         )
 
+    def test_build_must_with_metric_type(self):
+        types = 'awesome'
+        self.assertEqual(
+            self.client._build_must(None, None, types, None),
+            [{'terms': {'type': ['awesome']}}],
+        )
+
     def test_build_must_with_metric_types(self):
         types = ['awesome', 'amazing']
         self.assertEqual(
diff --git a/cloudkitty/tests/storage/v2/opensearch/test_client.py b/cloudkitty/tests/storage/v2/opensearch/test_client.py
index b33515c6..b3c2ae7a 100644
--- a/cloudkitty/tests/storage/v2/opensearch/test_client.py
+++ b/cloudkitty/tests/storage/v2/opensearch/test_client.py
@@ -53,6 +53,13 @@ def test_build_must_with_filters(self):
             [{'term': {'type': 'awesome'}}],
         )
 
+    def test_build_must_with_metric_type(self):
+        types = 'awesome'
+        self.assertEqual(
+            self.client._build_must(None, None, types, None),
+            [{'terms': {'type': ['awesome']}}],
+        )
+
     def test_build_must_with_metric_types(self):
         types = ['awesome', 'amazing']
         self.assertEqual(
diff --git a/releasenotes/notes/fix-elasticsearch-a9a37443f81b3a79.yaml b/releasenotes/notes/fix-elasticsearch-a9a37443f81b3a79.yaml
new file mode 100644
index 00000000..7568dbfb
--- /dev/null
+++ b/releasenotes/notes/fix-elasticsearch-a9a37443f81b3a79.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Fix request to Elasticsearch/OpenSearch that has potentially not the 
+    correct type.
diff --git a/tox.ini b/tox.ini
index a51a6542..2524e72b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,6 +15,7 @@ usedevelop = True
 deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2024.1}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
+       setuptools<82.0.0
 
 commands =
   find . -type f -name "*.py[co]" -delete
@@ -55,6 +56,7 @@ commands = oslopolicy-sample-generator --config-file=etc/oslo-policy-generator/c
 deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2024.1}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/doc/requirements.txt
+       setuptools<82.0.0
 commands = sphinx-build -W --keep-going -b html doc/source doc/build/html
 
 # TODO(smcginnis) Temporarily disabling this as it fails. Error is that
@@ -71,6 +73,7 @@ commands = sphinx-build -W --keep-going -b html doc/source doc/build/html
 # This environment is called from CI scripts to test and publish
 # the API Ref to docs.openstack.org.
 deps = -r{toxinidir}/doc/requirements.txt
+       setuptools<82.0.0
 allowlist_externals = rm
 commands =
   rm -rf api-ref/build