diff --git a/pom.xml b/pom.xml
index f408f2d..2bb1c61 100644
--- a/pom.xml
+++ b/pom.xml
@@ -84,7 +84,13 @@
       <artifactId>maven-artifact-transfer</artifactId>
       <version>3.0.0-SNAPSHOT</version>
     </dependency>
-    
+    <!-- Upgrade of transitive dependency. -->
+    <dependency>
+      <groupId>commons-io</groupId>
+      <artifactId>commons-io</artifactId>
+      <version>2.5</version>
+    </dependency>
+
     <!-- dependencies to annotations -->
     <dependency>
       <groupId>org.apache.maven.plugin-tools</groupId>