diff --git a/pom.xml b/pom.xml
index 45a89be..c31916b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -15,21 +15,21 @@
 		<dependency>
 			<groupId>com.github.ansell.aterms</groupId>
 			<artifactId>aterm-java</artifactId>
-			<version>1.8.2</version>
+			<version>1.8.2-p1</version>
 		</dependency>
 
 		<!-- saxon-he -->
 		<dependency>
 			<groupId>net.sf.saxon</groupId>
 			<artifactId>Saxon-HE</artifactId>
-			<version>9.5.1-6</version>
+			<version>9.8.0-14</version>
 		</dependency>
 
-		<!-- jgrapht (jdk 1.5) -->
+		<!-- jgrapht -->
 		<dependency>
 			<groupId>org.jgrapht</groupId>
-			<artifactId>jgrapht-jdk1.5</artifactId>
-			<version>0.7.3</version>
+			<artifactId>jgrapht-core</artifactId>
+			<version>1.2.0</version>
 		</dependency>
 
 		<!-- pellet -->
@@ -63,14 +63,14 @@
 		<dependency>
 			<groupId>net.sourceforge.owlapi</groupId>
 			<artifactId>owlapi-distribution</artifactId>
-			<version>3.5.0</version>
+			<version>5.1.7</version>
 		</dependency>
 
 		<!-- servlets -->
 		<dependency>
 			<groupId>javax.servlet</groupId>
 			<artifactId>servlet-api</artifactId>
-			<version>2.5</version>
+			<version>3.0-alpha-1</version>
 			<scope>provided</scope>
 		</dependency>
 
@@ -83,16 +83,20 @@
 
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.1</version>
+				<version>3.8.0</version>
 				<configuration>
-					<source>1.7</source>
-					<target>1.7</target>
+					<source>1.8</source>
+					<target>1.8</target>
+					<compilerArgs>
+						<arg>-Xlint</arg>
+					</compilerArgs>
 				</configuration>
 			</plugin>
 
 			<plugin>
-				<groupId>org.mortbay.jetty</groupId>
-				<artifactId>jetty-maven-plugin</artifactId>
+  				<groupId>org.eclipse.jetty</groupId>
+  				<artifactId>jetty-maven-plugin</artifactId>
+  				<version>9.4.12.v20180830</version>
 				<configuration>
 					<stopPort>9966</stopPort>
 					<stopKey>foo</stopKey>
@@ -106,6 +110,9 @@
 							<maxIdleTime>60000</maxIdleTime>
 						</connector>
 					</connectors>
+					<supportedPackagings>
+                		<supportedPackaging>jar</supportedPackaging>
+              		</supportedPackagings>
 				</configuration>
 			</plugin>
 
diff --git a/src/main/java/it/essepuntato/lode/LodeServlet.java b/src/main/java/it/essepuntato/lode/LodeServlet.java
index a8baddd..d700bcd 100644
--- a/src/main/java/it/essepuntato/lode/LodeServlet.java
+++ b/src/main/java/it/essepuntato/lode/LodeServlet.java
@@ -52,11 +52,13 @@
 
 import org.mindswap.pellet.PelletOptions;
 import org.semanticweb.owlapi.apibinding.OWLManager;
+import org.semanticweb.owlapi.io.IRIDocumentSource;
 import org.semanticweb.owlapi.io.RDFXMLOntologyFormat;
 import org.semanticweb.owlapi.io.StringDocumentTarget;
 import org.semanticweb.owlapi.model.AddImport;
 import org.semanticweb.owlapi.model.AddOntologyAnnotation;
 import org.semanticweb.owlapi.model.IRI;
+import org.semanticweb.owlapi.model.MissingImportHandlingStrategy;
 import org.semanticweb.owlapi.model.OWLAnnotation;
 import org.semanticweb.owlapi.model.OWLAnnotationAssertionAxiom;
 import org.semanticweb.owlapi.model.OWLAnnotationProperty;
@@ -71,6 +73,7 @@
 import org.semanticweb.owlapi.model.OWLOntology;
 import org.semanticweb.owlapi.model.OWLOntologyCreationException;
 import org.semanticweb.owlapi.model.OWLOntologyID;
+import org.semanticweb.owlapi.model.OWLOntologyLoaderConfiguration;
 import org.semanticweb.owlapi.model.OWLOntologyManager;
 import org.semanticweb.owlapi.model.OWLOntologyStorageException;
 import org.semanticweb.owlapi.util.InferredAxiomGenerator;
@@ -132,10 +135,10 @@ protected void doGet(HttpServletRequest request, HttpServletResponse response) t
 
 				String content = "";
 
-				boolean useOWLAPI = new Boolean(request.getParameter("owlapi"));
-				boolean considerImportedOntologies = new Boolean(request.getParameter("imported"));
-				boolean considerImportedClosure = new Boolean(request.getParameter("closure"));
-				boolean useReasoner = new Boolean(request.getParameter("reasoner"));
+				boolean useOWLAPI = Boolean.valueOf(request.getParameter("owlapi"));
+				boolean considerImportedOntologies = Boolean.valueOf(request.getParameter("imported"));
+				boolean considerImportedClosure = Boolean.valueOf(request.getParameter("closure"));
+				boolean useReasoner = Boolean.valueOf(request.getParameter("reasoner"));
 
 				if (considerImportedOntologies || considerImportedClosure || useReasoner) {
 					useOWLAPI = true;
@@ -226,9 +229,8 @@ private String parseWithOWLAPI(URL ontologyURL, boolean useOWLAPI, boolean consi
 
 		if (useOWLAPI) {
 			OWLOntologyManager manager = OWLManager.createOWLOntologyManager();
-			
+			OWLOntologyLoaderConfiguration loadingConfig = new OWLOntologyLoaderConfiguration();
 			OWLOntology ontology = null;
-
 			if (considerImportedClosure || considerImportedOntologies) {
 				ontology = manager.loadOntology(IRI.create(ontologyURL.toString()));
 				Set<OWLOntology> setOfImportedOntologies = new HashSet<OWLOntology>();
@@ -241,8 +243,8 @@ private String parseWithOWLAPI(URL ontologyURL, boolean useOWLAPI, boolean consi
 					manager.addAxioms(ontology, importedOntology.getAxioms());
 				}
 			} else {
-				manager.setSilentMissingImportsHandling(true);
-				ontology = manager.loadOntology(IRI.create(ontologyURL.toString()));
+				loadingConfig = loadingConfig.setMissingImportHandlingStrategy(MissingImportHandlingStrategy.SILENT);
+				ontology = manager.loadOntologyFromOntologyDocument(new IRIDocumentSource(IRI.create(ontologyURL.toString())), loadingConfig);
 			}
 
 			if (useReasoner) {
@@ -258,6 +260,7 @@ private String parseWithOWLAPI(URL ontologyURL, boolean useOWLAPI, boolean consi
 		return result;
 	}
 
+	@SuppressWarnings("unused")
 	private String addImportedAxioms(String result, List<String> removed) {
 		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 		factory.setNamespaceAware(true);
@@ -361,22 +364,22 @@ private OWLOntology parseWithReasoner(OWLOntologyManager manager, OWLOntology on
 
 			Map<OWLEntity, Set<OWLAnnotationAssertionAxiom>> entityAnnotations = new HashMap<OWLEntity, Set<OWLAnnotationAssertionAxiom>>();
 			for (OWLClass aEntity : ontology.getClassesInSignature()) {
-				entityAnnotations.put(aEntity, aEntity.getAnnotationAssertionAxioms(ontology));
+				entityAnnotations.put(aEntity, ontology.getAnnotationAssertionAxioms(aEntity.getIRI()));
 			}
 			for (OWLObjectProperty aEntity : ontology.getObjectPropertiesInSignature()) {
-				entityAnnotations.put(aEntity, aEntity.getAnnotationAssertionAxioms(ontology));
+				entityAnnotations.put(aEntity, ontology.getAnnotationAssertionAxioms(aEntity.getIRI()));
 			}
 			for (OWLDataProperty aEntity : ontology.getDataPropertiesInSignature()) {
-				entityAnnotations.put(aEntity, aEntity.getAnnotationAssertionAxioms(ontology));
+				entityAnnotations.put(aEntity, ontology.getAnnotationAssertionAxioms(aEntity.getIRI()));
 			}
 			for (OWLNamedIndividual aEntity : ontology.getIndividualsInSignature()) {
-				entityAnnotations.put(aEntity, aEntity.getAnnotationAssertionAxioms(ontology));
+				entityAnnotations.put(aEntity, ontology.getAnnotationAssertionAxioms(aEntity.getIRI()));
 			}
 			for (OWLAnnotationProperty aEntity : ontology.getAnnotationPropertiesInSignature()) {
-				entityAnnotations.put(aEntity, aEntity.getAnnotationAssertionAxioms(ontology));
+				entityAnnotations.put(aEntity, ontology.getAnnotationAssertionAxioms(aEntity.getIRI()));
 			}
 			for (OWLDatatype aEntity : ontology.getDatatypesInSignature()) {
-				entityAnnotations.put(aEntity, aEntity.getAnnotationAssertionAxioms(ontology));
+				entityAnnotations.put(aEntity, ontology.getAnnotationAssertionAxioms(aEntity.getIRI()));
 			}
 
 			manager.removeOntology(ontology);