diff --git a/frontend/src/api.ts b/frontend/src/api.ts
index 8660fd67..d1e554e4 100644
--- a/frontend/src/api.ts
+++ b/frontend/src/api.ts
@@ -1,4 +1,4 @@
-import type { ReportMeta, ReportResult } from './types'
+import type { ReportMeta, ReportResult, WorksheetData, ForecastReportData } from './types'
 
 const BASE = '/reports/api'
 
@@ -32,18 +32,18 @@ export function runReport(id: string, dateFrom: string, dateTo: string): Promise
 
 // ── Directors Forecast API ──────────────────────────────────────────────────
 
-export function dfGetWorksheet(year: number, month: number) {
-  return request(`/directors-forecast/worksheet/${year}/${month}`)
+export function dfGetWorksheet(year: number, month: number): Promise<WorksheetData> {
+  return request<WorksheetData>(`/directors-forecast/worksheet/${year}/${month}`)
 }
 
-export function dfSaveWorksheet(year: number, month: number, data: { pickup_avg_rate: number; overrides: object[] }) {
-  return request(`/directors-forecast/worksheet/${year}/${month}`, {
+export function dfSaveWorksheet(year: number, month: number, data: { pickup_avg_rate: number; overrides: object[] }): Promise<{ ok: boolean }> {
+  return request<{ ok: boolean }>(`/directors-forecast/worksheet/${year}/${month}`, {
     method: 'PUT', body: JSON.stringify(data),
   })
 }
 
-export function dfGetReport(year: number, month: number) {
-  return request(`/directors-forecast/report/${year}/${month}`)
+export function dfGetReport(year: number, month: number): Promise<ForecastReportData> {
+  return request<ForecastReportData>(`/directors-forecast/report/${year}/${month}`)
 }
 
 export function dfSaveSnapshot(year: number, month: number, data: object) {