diff --git a/build.gradle b/build.gradle
index 68c24f18..c5609014 100644
--- a/build.gradle
+++ b/build.gradle
@@ -62,7 +62,7 @@ dependencies {
   implementation 'commons-codec:commons-codec:1.15'
   implementation 'commons-fileupload:commons-fileupload:1.5'
   implementation 'commons-logging:commons-logging:1.2'
-  implementation 'commons-net:commons-net:3.8.0'
+  implementation 'commons-net:commons-net:3.9.0'
   implementation 'com.sun.mail:javax.mail:1.6.2'
   implementation 'javax.servlet:javax.servlet-api:4.0.1'
   implementation 'org.ccil.cowan.tagsoup:tagsoup:1.2.1'