diff --git a/tools/log4shellserver/pom.xml b/tools/log4shellserver/pom.xml
index 8cc46ee9..78d4c9d4 100644
--- a/tools/log4shellserver/pom.xml
+++ b/tools/log4shellserver/pom.xml
@@ -20,7 +20,7 @@
     <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-core</artifactId>
-      <version>2.15.0</version>
+      <version>2.21.1</version>
     </dependency>
     <dependency>
       <groupId>com.unboundid</groupId>