diff --git a/src/app/(auth)/captcha/route.ts b/src/app/(auth)/captcha/route.ts
index 703f15b..5cd9a57 100644
--- a/src/app/(auth)/captcha/route.ts
+++ b/src/app/(auth)/captcha/route.ts
@@ -42,7 +42,7 @@ function generateCaptchaImage(text: string) {
   }
 
   // 绘制文本
-  ctx.font = '28px Arial'
+  ctx.font = '28px sans-serif'
   ctx.textAlign = 'center'
   ctx.textBaseline = 'middle'