diff --git a/2.x/chapter3-9/pom.xml b/2.x/chapter3-9/pom.xml
index f8572620..6cd36813 100644
--- a/2.x/chapter3-9/pom.xml
+++ b/2.x/chapter3-9/pom.xml
@@ -23,7 +23,7 @@
 		<dependency>
 			<groupId>org.mybatis.spring.boot</groupId>
 			<artifactId>mybatis-spring-boot-starter</artifactId>
-			<version>2.1.1</version>
+			<version>3.0.5</version>
 		</dependency>
 
 		<dependency>