diff --git a/pom.xml b/pom.xml
index 61f65d41..37af2975 100644
--- a/pom.xml
+++ b/pom.xml
@@ -146,7 +146,7 @@
     <webwolf.port>9090</webwolf.port>
     <wiremock.version>2.27.2</wiremock.version>
     <xml-resolver.version>1.2</xml-resolver.version>
-    <xstream.version>1.4.5</xstream.version>
+    <xstream.version>1.4.20</xstream.version>
     <!-- do not update necessary for lesson -->
     <zxcvbn.version>1.8.0</zxcvbn.version>
   </properties>