diff --git a/schisandra-cloud-storage-auth/schisandra-cloud-storage-auth-application/schisandra-cloud-storage-auth-application-controller/src/main/java/com/schisandra/auth/application/controller/ReactRotateCaptchaController.java b/schisandra-cloud-storage-auth/schisandra-cloud-storage-auth-application/schisandra-cloud-storage-auth-application-controller/src/main/java/com/schisandra/auth/application/controller/ReactRotateCaptchaController.java
index f9fceff..e145bd0 100644
--- a/schisandra-cloud-storage-auth/schisandra-cloud-storage-auth-application/schisandra-cloud-storage-auth-application-controller/src/main/java/com/schisandra/auth/application/controller/ReactRotateCaptchaController.java
+++ b/schisandra-cloud-storage-auth/schisandra-cloud-storage-auth-application/schisandra-cloud-storage-auth-application-controller/src/main/java/com/schisandra/auth/application/controller/ReactRotateCaptchaController.java
@@ -13,6 +13,7 @@ import javax.imageio.ImageIO;
 import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.io.InputStream;
+import java.security.SecureRandom;
 import java.util.HashMap;
 import java.util.Random;
 import java.util.concurrent.CompletableFuture;
@@ -42,7 +43,7 @@ public class ReactRotateCaptchaController {
         CompletableFuture<HashMap> futurePrice = CompletableFuture.supplyAsync(() -> {
             HashMap<String, String> map = new HashMap<>();
             try {
-                Random random = new Random();
+                SecureRandom random = new SecureRandom();
                 double randomNumber = random.nextInt(280) + 40;
                 InputStream inputStream = ReactRotateCaptchaController.class.getClassLoader().getResourceAsStream("image/test1.jpg");
                 BufferedImage image = ImageIO.read(inputStream);