diff --git a/api/src/main/java/edu/cornell/mannlib/vitro/webapp/dao/jena/RDFServiceDataset.java b/api/src/main/java/edu/cornell/mannlib/vitro/webapp/dao/jena/RDFServiceDataset.java
index ea30dbf27..5898d1ff4 100644
--- a/api/src/main/java/edu/cornell/mannlib/vitro/webapp/dao/jena/RDFServiceDataset.java
+++ b/api/src/main/java/edu/cornell/mannlib/vitro/webapp/dao/jena/RDFServiceDataset.java
@@ -56,7 +56,12 @@ public class RDFServiceDataset implements Dataset {
         return RDFServiceGraph.createRDFServiceModel(g.getDefaultGraph());
     }
 
-    @Override
+	@Override
+	public Model getUnionModel() {
+		return RDFServiceGraph.createRDFServiceModel(g.getUnionGraph());
+	}
+
+	@Override
     public Lock getLock() {
         return g.getLock();
     }
diff --git a/api/src/main/java/edu/cornell/mannlib/vitro/webapp/dao/jena/RDFServiceDatasetGraph.java b/api/src/main/java/edu/cornell/mannlib/vitro/webapp/dao/jena/RDFServiceDatasetGraph.java
index fed31166c..4c9892133 100644
--- a/api/src/main/java/edu/cornell/mannlib/vitro/webapp/dao/jena/RDFServiceDatasetGraph.java
+++ b/api/src/main/java/edu/cornell/mannlib/vitro/webapp/dao/jena/RDFServiceDatasetGraph.java
@@ -259,7 +259,12 @@ public class RDFServiceDatasetGraph implements DatasetGraph {
             return graph;
         }
     }
-    
+
+    @Override
+    public RDFServiceGraph getUnionGraph() {
+        return defaultGraph;
+    }
+
     private boolean supportsTransactions(Graph graph) {
         return (graph.getTransactionHandler() != null 
                 && graph.getTransactionHandler().transactionsSupported());
diff --git a/dependencies/pom.xml b/dependencies/pom.xml
index cbe488523..5583e87e9 100644
--- a/dependencies/pom.xml
+++ b/dependencies/pom.xml
@@ -222,22 +222,22 @@
         <dependency>
             <groupId>org.apache.jena</groupId>
             <artifactId>jena-arq</artifactId>
-            <version>3.3.0</version>
+            <version>3.4.0</version>
         </dependency>
         <dependency>
             <groupId>org.apache.jena</groupId>
             <artifactId>jena-core</artifactId>
-            <version>3.3.0</version>
+            <version>3.4.0</version>
         </dependency>
         <dependency>
             <groupId>org.apache.jena</groupId>
             <artifactId>jena-sdb</artifactId>
-            <version>3.3.0</version>
+            <version>3.4.0</version>
         </dependency>
         <dependency>
             <groupId>org.apache.jena</groupId>
             <artifactId>jena-tdb</artifactId>
-            <version>3.3.0</version>
+            <version>3.4.0</version>
         </dependency>
         <dependency>
             <groupId>org.apache.solr</groupId>