diff --git a/pom.xml b/pom.xml
index 6840874..530492b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -444,7 +444,7 @@
             <dependency>
                 <groupId>commons-io</groupId>
                 <artifactId>commons-io</artifactId>
-                <version>2.1</version>
+                <version>2.7</version>
             </dependency>
 
             <!-- install kaptcha manually -->