diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/util/JsonUtil.java b/liteflow-core/src/main/java/com/yomahub/liteflow/util/JsonUtil.java
index 9ca896fcf..fddcfa1f5 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/util/JsonUtil.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/util/JsonUtil.java
@@ -11,9 +11,12 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.TimeZone;
 
 /**
  * JSON 工具类
@@ -24,11 +27,15 @@ public class JsonUtil {
 
     private static final Logger LOG = LoggerFactory.getLogger(JsonUtil.class);
 
-    private static ObjectMapper objectMapper = new ObjectMapper();
+    private static final ObjectMapper objectMapper = new ObjectMapper();
 
     private JsonUtil() {
     }
 
+    static {
+        objectMapper.setTimeZone(TimeZone.getDefault());
+    }
+
     public static String toJsonString(Object object) {
         if (ObjectUtil.isNull(object)) {
             return null;