diff --git a/app/controllers/Application.java b/app/controllers/Application.java
index d60729b5..f0366cb4 100644
--- a/app/controllers/Application.java
+++ b/app/controllers/Application.java
@@ -712,8 +712,8 @@ private static Result resultFor(String id, JsonNode json, String format) {
 		return resultSupplier == null ? rdfSupplier.get() : resultSupplier.get();
 	}
 
-	private static Pair<String, String> contentAndType(JsonNode responseJson,
-			String responseFormat) {
+	static Status responseFor(JsonNode responseJson, String responseFormat)
+			throws JsonProcessingException {
 		String content = "";
 		String contentType = "";
 		switch (responseFormat) {
@@ -733,11 +733,13 @@ private static Pair<String, String> contentAndType(JsonNode responseJson,
 			break;
 		}
 		default: {
-			content = prettyJsonOk(responseJson);
+			content = new ObjectMapper().writerWithDefaultPrettyPrinter()
+					.writeValueAsString(responseJson);
 			contentType = Accept.Format.JSON_LD.types[0];
 		}
 		}
-		return Pair.of(content, contentType + "; charset=utf-8");
+		return content.isEmpty() ? internalServerError("No content")
+				: ok(content).as(contentType + "; charset=utf-8");
 	}
 
 	private static String prettyJsonOk(JsonNode jsonNode) {
diff --git a/app/controllers/RdfConverter.java b/app/controllers/RdfConverter.java
index d9589ae0..6dfd43f7 100644
--- a/app/controllers/RdfConverter.java
+++ b/app/controllers/RdfConverter.java
@@ -1,21 +1,19 @@
 /* Copyright 2017 Fabian Steeg, hbz. Licensed under the EPL 2.0 */
 
-package controllers;
+package controllers.resources;
 
+import java.io.ByteArrayInputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.StringWriter;
-
-import com.github.jsonldjava.core.JsonLdError;
-import com.github.jsonldjava.core.JsonLdProcessor;
-import com.github.jsonldjava.jena.JenaTripleCallback;
-import com.github.jsonldjava.utils.JsonUtils;
-import com.hp.hpl.jena.rdf.model.Model;
+import org.apache.jena.rdf.model.Model;
+import org.apache.jena.rdf.model.ModelFactory;
 
 import play.Logger;
 
 /**
  * Helper class for converting JsonLd to RDF.
- * 
+ *
  * @author Fabian Steeg (fsteeg)
  *
  */
@@ -47,29 +45,31 @@ public String getName() {
 	 */
 	public static String toRdf(final String jsonLd, final RdfFormat format) {
 		try {
-			final Object jsonObject = JsonUtils.fromString(jsonLd);
-			final JenaTripleCallback callback = new JenaTripleCallback();
-			final Model model = (Model) JsonLdProcessor.toRDF(jsonObject, callback);
+			//convert json-ld string into InputStream as is required by the read() function.
+			final InputStream targetStream = new ByteArrayInputStream(jsonLd.getBytes());
+			final Model model = ModelFactory.createDefaultModel() ;
+
+			model.read(targetStream, "", "JSON-LD");
 			model.setNsPrefix("bf", "http://id.loc.gov/ontologies/bibframe/");
 			model.setNsPrefix("bibo", "http://purl.org/ontology/bibo/");
 			model.setNsPrefix("dc", "http://purl.org/dc/elements/1.1/");
 			model.setNsPrefix("dcterms", "http://purl.org/dc/terms/");
-			model.setNsPrefix("gndo", "http://d-nb.info/standards/elementset/gnd#");
+			model.setNsPrefix("gndo", "https://d-nb.info/standards/elementset/gnd#");
 			model.setNsPrefix("lv", "http://purl.org/lobid/lv#");
 			model.setNsPrefix("mo", "http://purl.org/ontology/mo/");
-			model.setNsPrefix("org", "http://www.w3.org/ns/org#");
 			model.setNsPrefix("owl", "http://www.w3.org/2002/07/owl#");
 			model.setNsPrefix("rdau", "http://rdaregistry.info/Elements/u/");
 			model.setNsPrefix("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
 			model.setNsPrefix("rdfs", "http://www.w3.org/2000/01/rdf-schema#");
-			model.setNsPrefix("schema", "https://schema.org/");
+			model.setNsPrefix("schema", "http://schema.org/");
 			model.setNsPrefix("skos", "http://www.w3.org/2004/02/skos/core#");
 			model.setNsPrefix("wdrs", "http://www.w3.org/2007/05/powder-s#");
 			model.setNsPrefix("xsd", "http://www.w3.org/2001/XMLSchema#");
+
 			final StringWriter writer = new StringWriter();
 			model.write(writer, format.getName());
 			return writer.toString();
-		} catch (IOException | JsonLdError e) {
+		} catch ( Exception e) {
 			Logger.error(e.getMessage(), e);
 		}
 		return null;
diff --git a/build.sbt b/build.sbt
index e5a0889f..069e12a1 100644
--- a/build.sbt
+++ b/build.sbt
@@ -15,9 +15,8 @@ libraryDependencies ++= Seq(
       // otherwise javaWs won't work
       exclude ("io.netty", "netty"),
   "com.fasterxml.jackson.core" % "jackson-annotations" % "2.15.1",
-  "com.github.jsonld-java" % "jsonld-java" % "0.4.1",
-  "com.github.jsonld-java" % "jsonld-java-jena" % "0.4.1" exclude("org.slf4j", "slf4j-log4j12"),
-  "org.apache.jena" % "jena-arq" % "2.9.3",
+  "com.github.jsonld-java" % "jsonld-java" % "0.13.4",
+  "org.apache.jena" % "jena-arq" % "3.17.0",
   "org.metafacture" % "metamorph" % "5.7.0-rc1",
   "org.metafacture" % "metafacture-elasticsearch" % "5.7.0-rc1",
   "org.metafacture" % "metamorph-test" % "5.7.0-rc1",
@@ -38,7 +37,6 @@ libraryDependencies ++= Seq(
 // force play to use these versions (ignoring transitive dependencies)
 dependencyOverrides += "com.fasterxml.jackson.core" % "jackson-databind" % "2.6.2"
 dependencyOverrides += "com.fasterxml.jackson.core" % "jackson-core" % "2.6.2"
-dependencyOverrides += "org.apache.jena" % "jena-core" % "2.11.1"
 
 resolvers += Resolver.mavenLocal