diff --git a/pom.xml b/pom.xml
index f2cf76a..c153551 100644
--- a/pom.xml
+++ b/pom.xml
@@ -164,7 +164,7 @@
     <dependency>
       <groupId>commons-net</groupId>
       <artifactId>commons-net</artifactId>
-      <version>3.1</version>
+      <version>3.9.0</version>
     </dependency>
 
     <!-- file upload -->