diff --git a/liteflow-core/pom.xml b/liteflow-core/pom.xml
index 745417a84..04ab79e44 100644
--- a/liteflow-core/pom.xml
+++ b/liteflow-core/pom.xml
@@ -9,7 +9,7 @@
     <parent>
 		<groupId>com.yomahub</groupId>
 		<artifactId>liteflow</artifactId>
-		<version>2.5.5</version>
+		<version>2.5.6</version>
 	</parent>
 
 	<dependencies>
diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/parser/XmlFlowParser.java b/liteflow-core/src/main/java/com/yomahub/liteflow/parser/XmlFlowParser.java
index 5af609625..e7c4d1f08 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/parser/XmlFlowParser.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/parser/XmlFlowParser.java
@@ -58,7 +58,9 @@ public abstract class XmlFlowParser extends FlowParser{
 				}
 			} else {
 				for (Entry<String, NodeComponent> componentEntry : ComponentScanner.nodeComponentMap.entrySet()) {
-					FlowBus.addNode(componentEntry.getKey(), new Node(componentEntry.getKey(), componentEntry.getValue().getClass().getName(), componentEntry.getValue()));
+					if (!FlowBus.containNode(componentEntry.getKey())){
+						FlowBus.addNode(componentEntry.getKey(), new Node(componentEntry.getKey(), componentEntry.getValue().getClass().getName(), componentEntry.getValue()));
+					}
 				}
 			}
 
diff --git a/liteflow-spring-boot-starter/pom.xml b/liteflow-spring-boot-starter/pom.xml
index ae8f68100..96f36a864 100644
--- a/liteflow-spring-boot-starter/pom.xml
+++ b/liteflow-spring-boot-starter/pom.xml
@@ -10,7 +10,7 @@
     <parent>
         <artifactId>liteflow</artifactId>
         <groupId>com.yomahub</groupId>
-        <version>2.5.5</version>
+        <version>2.5.6</version>
     </parent>
 
     <dependencies>
diff --git a/liteflow-test-spring/pom.xml b/liteflow-test-spring/pom.xml
index e24e07f74..1b5d89200 100644
--- a/liteflow-test-spring/pom.xml
+++ b/liteflow-test-spring/pom.xml
@@ -9,7 +9,7 @@
     <parent>
         <artifactId>liteflow</artifactId>
         <groupId>com.yomahub</groupId>
-        <version>2.5.5</version>
+        <version>2.5.6</version>
     </parent>
 
     <dependencies>
diff --git a/liteflow-test-springboot/pom.xml b/liteflow-test-springboot/pom.xml
index 9899d523a..734c6e906 100644
--- a/liteflow-test-springboot/pom.xml
+++ b/liteflow-test-springboot/pom.xml
@@ -9,7 +9,7 @@
     <parent>
         <artifactId>liteflow</artifactId>
         <groupId>com.yomahub</groupId>
-        <version>2.5.5</version>
+        <version>2.5.6</version>
     </parent>
 
     <dependencyManagement>
diff --git a/pom.xml b/pom.xml
index 21289929f..233d7ffb1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 	<groupId>com.yomahub</groupId>
     <artifactId>liteflow</artifactId>
     <packaging>pom</packaging>
-    <version>2.5.5</version>
+    <version>2.5.6</version>
 	<name>liteflow</name>
 	<description>a lightweight and practical micro-process framework</description>
 	<url>https://github.com/bryan31/liteflow</url>