diff --git a/frontend/src/pages/ClosedCases.jsx b/frontend/src/pages/ClosedCases.jsx
index 7e888ef..7d3c35f 100644
--- a/frontend/src/pages/ClosedCases.jsx
+++ b/frontend/src/pages/ClosedCases.jsx
@@ -138,9 +138,8 @@ export default function ClosedCases() {
     }
     setSaving(true);
     try {
-      const created = await apiFetch('/api/v1/closed-cases', {
+      const created = await apiJson('/api/v1/closed-cases', {
         method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify(CleanForm(form)),
       });
       setLastPrediction(created);
@@ -156,7 +155,7 @@ export default function ClosedCases() {
   const remove = async (id) => {
     if (!window.confirm('Удалить запись?')) return;
     try {
-      await apiFetch(`/api/v1/closed-cases/${id}`, { method: 'DELETE' });
+      await apiJson(`/api/v1/closed-cases/${id}`, { method: 'DELETE' });
       await load();
     } catch (e) {
       setError(e.message);