depend on robundle 0.3.1
diff --git a/pom.xml b/pom.xml
index 629a7cc..d0179b4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -65,7 +65,7 @@
         <dependency>
             <groupId>org.purl.wf4ever.robundle</groupId>
             <artifactId>robundle</artifactId>
-            <version>0.3.0</version>
+            <version>0.3.1</version>
         </dependency>
     </dependencies>