diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/flow/FlowBus.java b/liteflow-core/src/main/java/com/yomahub/liteflow/flow/FlowBus.java
index 1c40a3751..a49581980 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/flow/FlowBus.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/flow/FlowBus.java
@@ -62,7 +62,7 @@ public class FlowBus {
 
 	private static final Map<String, Node> fallbackNodeMap;
 
-	private static AtomicBoolean initStat = new AtomicBoolean(false);
+	private static final AtomicBoolean initStat = new AtomicBoolean(false);
 
 	static {
 		LiteflowConfig liteflowConfig = LiteflowConfigGetter.get();