diff --git a/_1/pom.xml b/_1/pom.xml
index 748c43d..9c31237 100644
--- a/_1/pom.xml
+++ b/_1/pom.xml
@@ -63,7 +63,7 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.11.1</version>
+            <version>2.15.0</version>
         </dependency>
         <dependency>
             <groupId>nz.ac.waikato.cms.weka</groupId>