diff --git a/ch09-spring/pom.xml b/ch09-spring/pom.xml
index 1777363..0dc774d 100644
--- a/ch09-spring/pom.xml
+++ b/ch09-spring/pom.xml
@@ -59,7 +59,7 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.13.0</version>
+            <version>2.17.0</version>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>