diff --git a/pom.xml b/pom.xml
index c5a2a21..bab417b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,17 +7,17 @@
   <artifactId>weasis-dicom-tools</artifactId>
   <packaging>jar</packaging>
   <name>Weasis DICOM API (based on dcm4che3)</name>
-  <version>5.31.0</version>
+  <version>5.31.1</version>
 
   <properties>
     <java-version>17</java-version>
     <enforcer.jdk-version>[${java-version},)</enforcer.jdk-version>
     <enforcer.maven-version>[3.0.5,)</enforcer.maven-version>
-    <dcm4che.version>5.31.0</dcm4che.version>
+    <dcm4che.version>5.31.1</dcm4che.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <weasis.core.img.version>4.8.0.1</weasis.core.img.version>
-    <weasis.opencv.native.version>4.8.0-dcm</weasis.opencv.native.version>
+    <weasis.core.img.version>4.8.1</weasis.core.img.version>
+    <weasis.opencv.native.version>4.8.1-dcm</weasis.opencv.native.version>
 
     <sonar.projectKey>weasis-dicom-tools</sonar.projectKey>
     <sonar.organization>nroduit-github</sonar.organization>
diff --git a/src/main/java/org/dcm4che3/img/op/MaskArea.java b/src/main/java/org/dcm4che3/img/op/MaskArea.java
index 9719dad..562fd81 100644
--- a/src/main/java/org/dcm4che3/img/op/MaskArea.java
+++ b/src/main/java/org/dcm4che3/img/op/MaskArea.java
@@ -58,8 +58,7 @@ public static ImageCV drawShape(Mat srcImg, MaskArea maskArea) {
       Scalar color =
           c == null ? new Scalar(0, 0, 0) : new Scalar(c.getBlue(), c.getGreen(), c.getRed());
       for (Shape shape : maskArea.getShapeList()) {
-        if (c == null && shape instanceof Rectangle) {
-          Rectangle r = (Rectangle) shape;
+        if (c == null && shape instanceof Rectangle r) {
           r = r.intersection(new Rectangle(0, 0, srcImg.width(), srcImg.height()));
           Rect rect2d = new Rect(r.x, r.y, r.width, r.height);
           if (r.width < 3 || r.height < 3) {