diff --git a/examples/async-thumbnails/pom.xml b/examples/async-thumbnails/pom.xml
index a4802e0a..e7b179be 100644
--- a/examples/async-thumbnails/pom.xml
+++ b/examples/async-thumbnails/pom.xml
@@ -50,7 +50,7 @@
         <dependency>
             <groupId>commons-net</groupId>
             <artifactId>commons-net</artifactId>
-            <version>3.8.0</version>
+            <version>3.9.0</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>