diff --git a/demo/pom.xml b/demo/pom.xml
index 78f191d..1bd41ca 100644
--- a/demo/pom.xml
+++ b/demo/pom.xml
@@ -17,7 +17,7 @@
         <maven.javadoc.skip>true</maven.javadoc.skip>
         <maven.deploy.skip>true</maven.deploy.skip>
 
-        <log4j.version>2.20.0</log4j.version>
+        <log4j.version>2.21.0</log4j.version>
     </properties>
 
     <artifactId>easysql-demo</artifactId>