updated PMD version
diff --git a/pom.xml b/pom.xml
index 614e1ec..b939b53 100644
--- a/pom.xml
+++ b/pom.xml
@@ -130,7 +130,7 @@
       </plugin>
       <plugin>
         <artifactId>maven-pmd-plugin</artifactId>
-        <version>2.0</version>
+        <version>2.3</version>
         <configuration>
           <rulesets>
             <ruleset>/rulesets/basic.xml</ruleset>