diff --git a/admin/src/api/auth.ts b/admin/src/api/auth.ts
index 6552157..52270f3 100644
--- a/admin/src/api/auth.ts
+++ b/admin/src/api/auth.ts
@@ -1,5 +1,5 @@
 import { adminApiClient } from './client'
-import type { AuthResponse, RequestCodeResponse, CodeStatusResponse, RefreshTokenResponse } from '@/types/models'
+import type { AuthResponse, CodeStatusResponse, RefreshTokenResponse } from '@/types/models'
 import type { AxiosError } from 'axios'
 
 export const authApi = {
diff --git a/admin/src/pages/DashboardPage.tsx b/admin/src/pages/DashboardPage.tsx
index 20c8e26..89acbc1 100644
--- a/admin/src/pages/DashboardPage.tsx
+++ b/admin/src/pages/DashboardPage.tsx
@@ -140,7 +140,7 @@ export default function DashboardPage() {
                   <YAxis />
                   <Tooltip
                     labelFormatter={(value) => new Date(value).toLocaleDateString()}
-                    formatter={(value: number) => [value, 'Registrations']}
+                    formatter={(value: number | undefined) => [value ?? 0, 'Registrations']}
                   />
                   <Line
                     type="monotone"
@@ -174,7 +174,7 @@ export default function DashboardPage() {
                   <YAxis />
                   <Tooltip
                     labelFormatter={(value) => new Date(value).toLocaleDateString()}
-                    formatter={(value: number) => [`$${value}`, 'Revenue']}
+                    formatter={(value: number | undefined) => [`$${value ?? 0}`, 'Revenue']}
                   />
                   <Bar dataKey="revenue" fill="#82ca9d" />
                 </BarChart>