diff --git a/build.gradle b/build.gradle
index 6b23e4a3..137ebb30 100644
--- a/build.gradle
+++ b/build.gradle
@@ -70,7 +70,7 @@ dependencies {
     compile "org.grails.plugins:cache"
     compile "org.hibernate:hibernate-ehcache"
     compile "org.apache.logging.log4j:log4j-api:2.18.0"
-    compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.18.0'
+    compile group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.24.3'
     compile "org.elasticsearch:elasticsearch:${elasticsearchVersion}"
     compile group: 'org.elasticsearch.client', name: 'elasticsearch-rest-client', version: elasticsearchVersion
     compile group: 'org.elasticsearch.client', name: 'elasticsearch-rest-high-level-client', version: elasticsearchVersion