diff --git a/pom.xml b/pom.xml
index 8d061ea..6f4cc0e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -73,7 +73,7 @@
         <ical4j.version>2.2.0</ical4j.version>
         <dom4j.version>2.0.0</dom4j.version>
 
-        <log4j.version>2.11.1</log4j.version>
+        <log4j.version>2.13.3</log4j.version>
         <slf4j.version>1.7.26</slf4j.version>
 
         <fastjson.version>1.2.72</fastjson.version>