diff --git a/vole-common/pom.xml b/vole-common/pom.xml
index 7df7483..37f5fcb 100644
--- a/vole-common/pom.xml
+++ b/vole-common/pom.xml
@@ -114,7 +114,7 @@
         <dependency>
             <groupId>commons-net</groupId>
             <artifactId>commons-net</artifactId>
-            <version>3.6</version>
+            <version>3.9.0</version>
             <optional>true</optional>
         </dependency>
         <!-- ftp end -->