diff --git a/pom.xml b/pom.xml
index 33c05c5..e3749d5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -52,6 +52,11 @@
           <artifactId>joda-time</artifactId>
           <version>2.2</version>
       </dependency>
+      <dependency>
+      	<groupId>commons-lang</groupId>
+      	<artifactId>commons-lang</artifactId>
+      	<version>2.6</version>
+      </dependency>
   </dependencies>
   <build>
     <sourceDirectory>${basedir}/src/main/java</sourceDirectory>