diff --git a/dbswitch-common/src/main/java/org/dromara/dbswitch/common/util/ObjectCastUtils.java b/dbswitch-common/src/main/java/org/dromara/dbswitch/common/util/ObjectCastUtils.java
index 5118a290..2e402c0e 100644
--- a/dbswitch-common/src/main/java/org/dromara/dbswitch/common/util/ObjectCastUtils.java
+++ b/dbswitch-common/src/main/java/org/dromara/dbswitch/common/util/ObjectCastUtils.java
@@ -70,7 +70,9 @@ public final class ObjectCastUtils {
 
 
   public static byte[] castToByteArray(final Object in) {
-    if (in instanceof byte[]) {
+    if (in == null) {
+      return null;
+    } else if (in instanceof byte[]) {
       return (byte[]) in;
     } else if (in instanceof java.util.Date) {
       return in.toString().getBytes();