diff --git a/frontend/src/api.ts b/frontend/src/api.ts
index 12c85d8..e8bb7a4 100644
--- a/frontend/src/api.ts
+++ b/frontend/src/api.ts
@@ -3,9 +3,10 @@ import type { DeptActuals, DeptScheduled, NetSalesDay, WageBudget, AppSetting }
 const BASE = '/wages/api'
 
 async function request<T>(path: string, opts: RequestInit = {}): Promise<T> {
+  const headers: Record<string, string> = opts.body != null ? { 'Content-Type': 'application/json' } : {}
   const res = await fetch(`${BASE}${path}`, {
     credentials: 'include',
-    headers: { 'Content-Type': 'application/json', ...opts.headers },
+    headers: { ...headers, ...opts.headers },
     ...opts,
   })
   if (res.status === 401) {