diff --git a/src/sentry/uptime/endpoints/validators.py b/src/sentry/uptime/endpoints/validators.py
index 0a57bf369e4213..882603e3293eb0 100644
--- a/src/sentry/uptime/endpoints/validators.py
+++ b/src/sentry/uptime/endpoints/validators.py
@@ -283,9 +283,9 @@ def update(self, instance: ProjectUptimeSubscription, data):
             # Nest seat availability errors under status. Since this is the
             # field that will trigger seat availability errors.
             if err.result is None:
-                raise serializers.ValidationError({"status": "Cannot enable uptime monitor"})
+                raise serializers.ValidationError({"status": ["Cannot enable uptime monitor"]})
             else:
-                raise serializers.ValidationError({"status": err.result.reason})
+                raise serializers.ValidationError({"status": [err.result.reason]})
         finally:
             create_audit_entry(
                 request=self.context["request"],
diff --git a/tests/sentry/uptime/endpoints/test_project_uptime_alert_details.py b/tests/sentry/uptime/endpoints/test_project_uptime_alert_details.py
index 9622f54b831774..8ee0165df0fee4 100644
--- a/tests/sentry/uptime/endpoints/test_project_uptime_alert_details.py
+++ b/tests/sentry/uptime/endpoints/test_project_uptime_alert_details.py
@@ -243,7 +243,7 @@ def test_status_enable_no_seat_assignment(self, _mock_check_assign_seat):
         uptime_monitor.refresh_from_db()
         assert uptime_monitor.status == ObjectStatus.DISABLED
         assert resp.data == {
-            "status": ErrorDetail(string="Assignment failed in test", code="invalid")
+            "status": [ErrorDetail(string="Assignment failed in test", code="invalid")]
         }