Bump log4j from 2.17.1 to 2.20.0
diff --git a/pom.xml b/pom.xml
index 68a975c..3fb11a1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -165,7 +165,7 @@
     <hsqldb.version>1.8.0.10</hsqldb.version>
     <jcl.over.slf4j.version>1.7.36</jcl.over.slf4j.version>
     <junit.version>4.13.2</junit.version>
-    <log4j.version>2.17.1</log4j.version>
+    <log4j.version>2.20.0</log4j.version>
     <mina.core.version>2.1.6</mina.core.version>
     <slf4j.api.version>1.7.36</slf4j.api.version>
     <slf4j.log4j12.version>1.7.36</slf4j.log4j12.version>