diff --git a/hw3-yuewenz/Q4/a/pom.xml b/hw3-yuewenz/Q4/a/pom.xml
index 092e877..1217e02 100644
--- a/hw3-yuewenz/Q4/a/pom.xml
+++ b/hw3-yuewenz/Q4/a/pom.xml
@@ -25,7 +25,7 @@
     <dependency>
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-common</artifactId>
-      <version>2.9.2</version>
+      <version>3.2.3</version>
     </dependency>
     <dependency>
       <groupId>org.apache.hadoop</groupId>