diff --git a/flink-code-java-0421/pom.xml b/flink-code-java-0421/pom.xml
index 2180ed37..e8d4d907 100644
--- a/flink-code-java-0421/pom.xml
+++ b/flink-code-java-0421/pom.xml
@@ -34,7 +34,7 @@ under the License.
 		<scala.binary.version>2.11</scala.binary.version>
 		<maven.compiler.source>${java.version}</maven.compiler.source>
 		<maven.compiler.target>${java.version}</maven.compiler.target>
-		<log4j.version>2.12.1</log4j.version>
+		<log4j.version>2.15.0</log4j.version>
 		<hive.version>3.1.2</hive.version>
 		<hadoop.version>3.2.1</hadoop.version>
 	</properties>