diff --git a/citations/citations-impl/impl/pom.xml b/citations/citations-impl/impl/pom.xml
index 487e568b1f6b..dcc08940db74 100644
--- a/citations/citations-impl/impl/pom.xml
+++ b/citations/citations-impl/impl/pom.xml
@@ -116,7 +116,7 @@
     <dependency>
       <groupId>com.thoughtworks.xstream</groupId>
       <artifactId>xstream</artifactId>
-      <version>1.4.18</version>
+      <version>1.4.20</version>
     </dependency>
     <dependency>
       <groupId>backport-util-concurrent</groupId>