diff --git a/phase4-peppol-client/pom.xml b/phase4-peppol-client/pom.xml
index 21600d9f2..af5e2aa2e 100644
--- a/phase4-peppol-client/pom.xml
+++ b/phase4-peppol-client/pom.xml
@@ -77,6 +77,11 @@
       <artifactId>phive-xml</artifactId>
       <version>${phive.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.helger.phive.rules</groupId>
+      <artifactId>phive-rules-en16931</artifactId>
+      <version>${phive-rules.version}</version>
+    </dependency>
     <dependency>
       <groupId>com.helger.phive.rules</groupId>
       <artifactId>phive-rules-peppol</artifactId>