diff --git a/0000-java8_demo/pom.xml b/0000-java8_demo/pom.xml
index 3286a23c..ddd03ece 100644
--- a/0000-java8_demo/pom.xml
+++ b/0000-java8_demo/pom.xml
@@ -43,7 +43,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-core</artifactId>
-            <version>1.2.3</version>
+            <version>1.2.9</version>
         </dependency>
         <dependency>
             <groupId>ch.qos.logback</groupId>