diff --git a/pom.xml b/pom.xml
index 701dfbf..6eafe56 100644
--- a/pom.xml
+++ b/pom.xml
@@ -109,6 +109,11 @@
         </exclusion>
       </exclusions>
     </dependency>
+    <dependency>
+      <groupId>commons-lang</groupId>
+      <artifactId>commons-lang</artifactId>
+      <version>2.4</version>
+    </dependency>
     <dependency>
       <groupId>com.drewnoakes</groupId>
       <artifactId>metadata-extractor</artifactId>