diff --git a/pom.xml b/pom.xml
index e3b0ae18d..d74766a4e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1059,7 +1059,7 @@
     <maven-javadoc-plugin.version>3.5.0</maven-javadoc-plugin.version>
     <maven-jxr-plugin.version>3.3.0</maven-jxr-plugin.version>
     <maven-plugin-plugin.version>3.8.1</maven-plugin-plugin.version>
-    <maven-pmd-plugin.version>3.20.0</maven-pmd-plugin.version>
+    <maven-pmd-plugin.version>3.21.0</maven-pmd-plugin.version>
     <maven-project-info-reports-plugin.version>3.4.2</maven-project-info-reports-plugin.version>
     <maven-release-plugin.version>2.5.3</maven-release-plugin.version>
     <maven-repository-plugin.version>2.4</maven-repository-plugin.version>