diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/parser/helper/ParserHelper.java b/liteflow-core/src/main/java/com/yomahub/liteflow/parser/helper/ParserHelper.java
index 7d41be117..8d2698d9e 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/parser/helper/ParserHelper.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/parser/helper/ParserHelper.java
@@ -15,10 +15,7 @@ import com.yomahub.liteflow.flow.FlowBus;
 import org.dom4j.Document;
 import org.dom4j.Element;
 
-import java.util.Iterator;
-import java.util.List;
-import java.util.Optional;
-import java.util.Set;
+import java.util.*;
 import java.util.function.Consumer;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;