diff --git a/pom.xml b/pom.xml
index fd0e96d2..8d1c05dc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -81,7 +81,7 @@
     <maven-jar-plugin.version>3.4.2</maven-jar-plugin.version>
     <maven-pmd-plugin.version>3.27.0</maven-pmd-plugin.version>
     <pmd.version>7.17.0</pmd.version>
-    <pmd.metrics.version>7.16.0-metrics</pmd.metrics.version>
+    <pmd.metrics.version>7.17.0-metrics</pmd.metrics.version>
     <maven-checkstyle-plugin.version>3.6.0</maven-checkstyle-plugin.version>
     <checkstyle.version>11.0.1</checkstyle.version>
     <spotbugs-maven-plugin.version>4.9.5.0</spotbugs-maven-plugin.version>
diff --git a/src/main/java/edu/hm/hafner/util/LineRangeList.java b/src/main/java/edu/hm/hafner/util/LineRangeList.java
index 0e802d86..5821d5fb 100644
--- a/src/main/java/edu/hm/hafner/util/LineRangeList.java
+++ b/src/main/java/edu/hm/hafner/util/LineRangeList.java
@@ -210,6 +210,7 @@ public void trim() {
     /**
      * Navigates through the ranges and performs the conversion to and from {@link LineRange}.
      */
+    @SuppressWarnings("PMD.AssignmentInOperand")
     private class Cursor implements ListIterator<LineRange> {
         private int position;
 
diff --git a/src/main/java/edu/hm/hafner/util/TreeString.java b/src/main/java/edu/hm/hafner/util/TreeString.java
index 9a10a269..ad6e80b7 100644
--- a/src/main/java/edu/hm/hafner/util/TreeString.java
+++ b/src/main/java/edu/hm/hafner/util/TreeString.java
@@ -122,6 +122,7 @@ public int hashCode() {
      * Returns the full string representation.
      */
     @Override
+    @SuppressWarnings("PMD.AssignmentInOperand")
     public String toString() {
         var tokens = new char[depth()][];
         int i = tokens.length;