diff --git a/build.gradle b/build.gradle
index 898639b..c9d380a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -130,7 +130,7 @@ dependencies {
     implementation 'org.eclipse.jetty:jetty-servlet:10.0.15'
     implementation 'commons-fileupload:commons-fileupload:1.5'
     implementation 'org.apache.logging.log4j:log4j-core:2.20.0'
-    implementation 'org.apache.logging.log4j:log4j-jcl:2.20.0'
+    implementation 'org.apache.logging.log4j:log4j-jcl:2.21.1'
 
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.10.0'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.10.0'