diff --git a/Chapter6-1-1/pom.xml b/Chapter6-1-1/pom.xml
index ef3fd659..2c73e152 100644
--- a/Chapter6-1-1/pom.xml
+++ b/Chapter6-1-1/pom.xml
@@ -32,7 +32,7 @@
org.springframework.statemachine
spring-statemachine-core
- 1.2.0.RELEASE
+ 2.0.0.RELEASE