diff --git a/src/main/java/io/github/talelin/latticy/common/configuration/LoginCaptchaProperties.java b/src/main/java/io/github/talelin/latticy/common/configuration/LoginCaptchaProperties.java
index 0b5284af..d5a24b51 100644
--- a/src/main/java/io/github/talelin/latticy/common/configuration/LoginCaptchaProperties.java
+++ b/src/main/java/io/github/talelin/latticy/common/configuration/LoginCaptchaProperties.java
@@ -3,12 +3,15 @@
 import io.github.talelin.latticy.common.util.CaptchaUtil;
 import lombok.Getter;
 import lombok.Setter;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.stereotype.Component;
+import org.springframework.util.StringUtils;
 
 /**
  * @author Gadfly
  */
+@Slf4j
 @Getter
 @Setter
 @Component
@@ -17,13 +20,38 @@ public class LoginCaptchaProperties {
     /**
      * aes 密钥
      */
-    private String secret = CaptchaUtil.getRandomString(32);
+    private String secret;
     /**
      * aes 偏移量
      */
-    private String iv = CaptchaUtil.getRandomString(16);
+    private String iv;
     /**
      * 启用验证码
      */
     private Boolean enabled = Boolean.FALSE;
+
+    public void setSecret(String secret) {
+        this.secret = CaptchaUtil.getRandomString(32);
+        if (StringUtils.hasText(secret)) {
+            byte[] bytes = secret.getBytes();
+            if (bytes.length == 16 || bytes.length == 24 || bytes.length == 32) {
+                this.secret = secret;
+            } else {
+                log.warn("AES密钥必须为128/192/256bit，输入的密钥为{}bit，已启用随机密钥{}", bytes.length * 8, this.secret);
+            }
+        }
+    }
+
+    public void setIv(String iv) {
+        this.iv = CaptchaUtil.getRandomString(16);
+        if (StringUtils.hasText(iv)) {
+            byte[] bytes = iv.getBytes();
+            if (bytes.length == 16) {
+                this.iv = iv;
+            } else {
+                log.warn("AES初始向量必须为128bit，输入的密钥为{}bit，已启用随机向量{}", bytes.length * 8, this.iv);
+            }
+        }
+    }
+
 }