diff --git a/pom.xml b/pom.xml
index 54085508dd..7ea5aadfff 100644
--- a/pom.xml
+++ b/pom.xml
@@ -102,7 +102,7 @@
     <taglibs-version>1.2.5</taglibs-version>
     <velocity-version>2.4.1</velocity-version>
     <xpp3-version>1.1.4c</xpp3-version>
-    <xstream-version>1.4.20</xstream-version>
+    <xstream-version>1.4.21</xstream-version>
     <xbean-version>4.26</xbean-version>
     <xerces-version>2.12.2</xerces-version>
     <jaxb-tools-version>4.0.8</jaxb-tools-version>