diff --git a/src/main/java/net/geedge/asw/module/environment/controller/EnvironmentController.java b/src/main/java/net/geedge/asw/module/environment/controller/EnvironmentController.java
index 826c2fa..e8025f7 100644
--- a/src/main/java/net/geedge/asw/module/environment/controller/EnvironmentController.java
+++ b/src/main/java/net/geedge/asw/module/environment/controller/EnvironmentController.java
@@ -180,10 +180,10 @@ public class EnvironmentController {
         // build query param
         Map params = T.MapUtil.builder().put("id", pcapId).put("returnFile", true).build();
         ResponseEntity<byte[]> responseEntity = EnvironmentUtil.stopTcpdump(environment, params);
-        if (ObjectUtil.isNotNull(param.get("savePcap"))){
+        if (T.MapUtil.getBool(param, "savePcap")){
             // save pcap to workspace
             WorkspaceEntity workspace = workspaceService.getById(session.getWorkspaceId());
-            String pcapName = T.StrUtil.emptyToDefault(param.get("pcapName").toString(), pcapId);
+            String pcapName = T.StrUtil.emptyToDefault(T.MapUtil.getStr(param,"pcapName"), pcapId);
             File destination = T.FileUtil.file(T.WebPathUtil.getRootPath(), workspace.getId(), T.StrUtil.concat(true,pcapName, ".pcap"));
             if (destination.exists()){
                 String formatTime = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());