diff --git a/validator/pom.xml b/validator/pom.xml
index 5193c1b4..0f4fc937 100644
--- a/validator/pom.xml
+++ b/validator/pom.xml
@@ -90,6 +90,11 @@
             <artifactId>ph-schematron-xslt</artifactId>
             <version>6.3.3</version>
         </dependency>
+        <dependency>
+            <groupId>com.helger</groupId>
+            <artifactId>ph-jaxb</artifactId>
+            <version>9.5.5</version>
+        </dependency>
         <dependency>
             <groupId>org.mustangproject</groupId>
             <artifactId>library</artifactId>