diff --git a/httpdoc-sample/pom.xml b/httpdoc-sample/pom.xml
index 084e4e59..190075da 100644
--- a/httpdoc-sample/pom.xml
+++ b/httpdoc-sample/pom.xml
@@ -56,7 +56,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-core</artifactId>
-            <version>1.1.3</version>
+            <version>1.2.0</version>
         </dependency>
         <dependency>
             <groupId>ch.qos.logback</groupId>