diff --git a/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/PasswordUtil.java b/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/PasswordUtil.java
index 85004a15..0a2b241f 100644
--- a/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/PasswordUtil.java
+++ b/jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/PasswordUtil.java
@@ -177,7 +177,7 @@ public class PasswordUtil {
 	 */
 	public static byte[] hexStringToBytes(String hexString) {
 		if (hexString == null || "".equals(hexString)) {
-			return null;
+			return new byte[0];
 		}
 		hexString = hexString.toUpperCase();
 		int length = hexString.length() / 2;