diff --git a/1.x/Chapter6-1-1/pom.xml b/1.x/Chapter6-1-1/pom.xml
index ef3fd65..9866fe6 100644
--- a/1.x/Chapter6-1-1/pom.xml
+++ b/1.x/Chapter6-1-1/pom.xml
@@ -32,7 +32,7 @@
 		<dependency>
 			<groupId>org.springframework.statemachine</groupId>
 			<artifactId>spring-statemachine-core</artifactId>
-			<version>1.2.0.RELEASE</version>
+			<version>4.0.1</version>
 		</dependency>
 	</dependencies>
 	<build>