diff --git a/pom.xml b/pom.xml
index a5fa798..2eab20a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
         <checkstyle.version>3.6.0</checkstyle.version>
         <findbugs.version>3.0.5</findbugs.version>
         <javadoc.version>3.12.0</javadoc.version>
-        <pmd.version>3.27.0</pmd.version>
+        <pmd.version>3.28.0</pmd.version>
         <jdepend.version>2.1</jdepend.version>
         <javancss.version>2.1</javancss.version>
         <project.info.version>3.9.0</project.info.version>