diff --git a/build/optaplanner-build-parent/pom.xml b/build/optaplanner-build-parent/pom.xml
index c1459d50d78..8c076cc2d1e 100644
--- a/build/optaplanner-build-parent/pom.xml
+++ b/build/optaplanner-build-parent/pom.xml
@@ -44,7 +44,7 @@
     <!-- Normal dependency versions -->
     <version.ch.qos.logback>1.4.14</version.ch.qos.logback>
     <version.org.apache.logging.log4j>2.22.1</version.org.apache.logging.log4j>
-    <version.com.thoughtworks.xstream>1.4.20</version.com.thoughtworks.xstream>
+    <version.com.thoughtworks.xstream>1.4.21</version.com.thoughtworks.xstream>
     <version.io.quarkiverse.operatorsdk>6.6.7</version.io.quarkiverse.operatorsdk>
     <version.io.quarkus>3.8.6</version.io.quarkus>
     <version.org.apache.commons.math3>3.6.1</version.org.apache.commons.math3>