diff --git a/code/pom.xml b/code/pom.xml
index 13b02fa..1406d1c 100644
--- a/code/pom.xml
+++ b/code/pom.xml
@@ -195,7 +195,7 @@
         <dependency>
             <groupId>net.lingala.zip4j</groupId>
             <artifactId>zip4j</artifactId>
-            <version>2.9.0</version>
+            <version>2.9.1</version>
         </dependency>
         <dependency>
             <groupId>net.sf.trove4j</groupId>