diff --git a/CheckDomain/pom.xml b/CheckDomain/pom.xml
index 9ea457c..9e46ae9 100644
--- a/CheckDomain/pom.xml
+++ b/CheckDomain/pom.xml
@@ -74,7 +74,7 @@
         <dependency>
             <groupId>commons-net</groupId>
             <artifactId>commons-net</artifactId>
-            <version>3.6</version>
+            <version>3.9.0</version>
         </dependency>
         <dependency>
             <groupId>org.parboiled</groupId>