diff --git a/packages/sub/pom.xml b/packages/sub/pom.xml
index dff7d473fe..b06206a7a9 100644
--- a/packages/sub/pom.xml
+++ b/packages/sub/pom.xml
@@ -23,7 +23,7 @@
 		<maven.compiler.source>1.7</maven.compiler.source>
 		<maven.compiler.target>1.7</maven.compiler.target>
    		<cloud.function.context.version>3.1.0</cloud.function.context.version>
-    		<log4j.version>2.14.0</log4j.version>
+    		<log4j.version>2.15.0</log4j.version>
   	</properties>
 
   	<dependencies>