diff --git a/src/ch6/serving/tensor-serving-client-test/pom.xml b/src/ch6/serving/tensor-serving-client-test/pom.xml
index 991e36a..43b2ab5 100644
--- a/src/ch6/serving/tensor-serving-client-test/pom.xml
+++ b/src/ch6/serving/tensor-serving-client-test/pom.xml
@@ -35,7 +35,7 @@
 		<dependency>
 			<groupId>ch.qos.logback</groupId>
 			<artifactId>logback-classic</artifactId>
-			<version>1.0.13</version>
+			<version>1.2.0</version>
 		</dependency>
 		<dependency>
 			<groupId>ch.qos.logback</groupId>