diff --git a/pom.xml b/pom.xml
index 3c6da01..e6d8a61 100644
--- a/pom.xml
+++ b/pom.xml
@@ -212,6 +212,12 @@
     </dependency>
     -->
 
+    <!-- Some language extensions like StringUtil -->
+    <dependency>
+      <groupId>commons-lang</groupId>
+      <artifactId>commons-lang</artifactId>
+      <version>2.3</version>
+    </dependency>
   </dependencies>
 
   <build>