diff --git a/kestrel-example/pom.xml b/kestrel-example/pom.xml
index 5b97181..8f21a71 100644
--- a/kestrel-example/pom.xml
+++ b/kestrel-example/pom.xml
@@ -92,7 +92,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.2.3</version>
+            <version>1.3.12</version>
         </dependency>
         <dependency>
             <groupId>io.projectreactor.netty</groupId>