diff --git a/03_AdditionalChapters/hw04/GuocongSong/display-ad-java/pom.xml b/03_AdditionalChapters/hw04/GuocongSong/display-ad-java/pom.xml
index 785baaa..8d05154 100644
--- a/03_AdditionalChapters/hw04/GuocongSong/display-ad-java/pom.xml
+++ b/03_AdditionalChapters/hw04/GuocongSong/display-ad-java/pom.xml
@@ -21,7 +21,7 @@
 		<dependency>
 			<groupId>org.apache.commons</groupId>
 			<artifactId>commons-lang3</artifactId>
-			<version>3.3.2</version>
+			<version>3.18.0</version>
 		</dependency>
 
 	</dependencies>