diff --git a/apps/api/src/routes/clients.ts b/apps/api/src/routes/clients.ts
index 9a375ce..38104ec 100644
--- a/apps/api/src/routes/clients.ts
+++ b/apps/api/src/routes/clients.ts
@@ -8,7 +8,7 @@ export const clientsRouter = new Hono<AppEnv>();
 
 const createClientSchema = z.object({
   name: z.string().min(1).max(200),
-  email: z.string().email().optional(),
+  email: z.string().email(),
   phone: z.string().max(50).optional(),
   address: z.string().max(500).optional(),
   notes: z.string().max(2000).optional(),