diff --git a/pom.xml b/pom.xml
index c7cbcf42c0..55b267863a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -54,7 +54,7 @@
 
     <!-- logging -->
     <logback-classic.version>1.4.11</logback-classic.version>
-    <log4j.version>2.20.0</log4j.version>
+    <log4j.version>2.21.0</log4j.version>
     <slf4j.version>2.0.9</slf4j.version>
 
     <!-- communication -->