diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/entity/flow/Node.java b/liteflow-core/src/main/java/com/yomahub/liteflow/entity/flow/Node.java
index 705196eb5..5ebf1f45e 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/entity/flow/Node.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/entity/flow/Node.java
@@ -36,7 +36,7 @@ public class Node implements Executable{
 
 	private NodeComponent instance;
 
-	private Map<String, Executable> condNodeMap = new HashMap<String, Executable>();
+	private final Map<String, Executable> condNodeMap = new HashMap<>();
 
 	public Node(){