diff --git a/spring-boot-study-ftpclient/pom.xml b/spring-boot-study-ftpclient/pom.xml
index 3788ddc..f6a1034 100644
--- a/spring-boot-study-ftpclient/pom.xml
+++ b/spring-boot-study-ftpclient/pom.xml
@@ -27,7 +27,7 @@
         <dependency>
             <groupId>commons-net</groupId>
             <artifactId>commons-net</artifactId>
-            <version>3.6</version>
+            <version>3.9.0</version>
         </dependency>
 
         <dependency>