diff --git a/pom.xml b/pom.xml
index 366cd13661..00819213bc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -448,12 +448,12 @@ Additionally it includes CPD, the copy-paste-detector. CPD finds duplicated code
                         <dependency>
                             <groupId>net.sourceforge.pmd</groupId>
                             <artifactId>pmd-core</artifactId>
-                            <version>6.1.0</version>
+                            <version>6.4.0</version>
                         </dependency>
                         <dependency>
                             <groupId>net.sourceforge.pmd</groupId>
                             <artifactId>pmd-java</artifactId>
-                            <version>6.1.0</version>
+                            <version>6.4.0</version>
                         </dependency>
                         <!-- This contains the dogfood ruleset -->
                         <dependency>