diff --git a/gradle.properties b/gradle.properties
index c5ac801..c6863a3 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,14 +1,14 @@
 group = org.xbib
 name = oai
-version = 1.1.0
+version = 1.2.0
 
-xbib-content.version = 1.1.0
+xbib-content.version = 1.3.0
+xbib-marc.version = 1.1.0
 xbib-bibliographic-character-sets.version = 1.0.0
-xbib-marc.version = 1.0.17
-helianthus.version = 1.0.10
-tcnative.version = 2.0.1.Final
-alpnagent.version = 2.0.6
+helianthus.version = 1.0.13
+tcnative.version = 2.0.7.Final
+alpnagent.version = 2.0.7
 junit.version 4.12
-log4j.version = 2.8.2
-wagon.version = 2.12
+log4j.version = 2.10.0
+wagon.version = 3.0.0
 asciidoclet.version = 1.5.4
\ No newline at end of file
diff --git a/gradle/publish.gradle b/gradle/publish.gradle
index caf0531..7bf8ad6 100644
--- a/gradle/publish.gradle
+++ b/gradle/publish.gradle
@@ -1,12 +1,13 @@
 
 task xbibUpload(type: Upload, dependsOn: build) {
+    group = 'publish'
     configuration = configurations.archives
     uploadDescriptor = true
     repositories {
         if (project.hasProperty('xbibUsername')) {
             mavenDeployer {
                 configuration = configurations.wagon
-                repository(url: uri('scpexe://xbib.org/repository')) {
+                repository(url: uri(project.property('xbibUrl'))) {
                         authentication(userName: xbibUsername, privateKey: xbibPrivateKey)
                 }
             }
@@ -15,6 +16,7 @@ task xbibUpload(type: Upload, dependsOn: build) {
 }
 
 task sonatypeUpload(type: Upload, dependsOn: build) {
+    group = 'publish'
     configuration = configurations.archives
     uploadDescriptor = true
     repositories {
@@ -64,3 +66,7 @@ task sonatypeUpload(type: Upload, dependsOn: build) {
         }
     }
 }
+
+nexusStaging {
+    packageGroup = "org.xbib"
+}
diff --git a/gradle/sonarqube.gradle b/gradle/sonarqube.gradle
index 0a37566..3985a4f 100644
--- a/gradle/sonarqube.gradle
+++ b/gradle/sonarqube.gradle
@@ -1,8 +1,8 @@
 tasks.withType(FindBugs) {
     ignoreFailures = true
     reports {
-        xml.enabled = true
-        html.enabled = false
+        xml.enabled = false
+        html.enabled = true
     }
 }
 tasks.withType(Pmd) {
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 6b6ea3a..c44b679 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index bd637f3..cad203e 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Wed Dec 06 21:25:32 CET 2017
+#Wed Feb 07 09:29:06 CET 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.3.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.5.1-all.zip
diff --git a/oai-client/src/test/java/org/xbib/oai/client/BundeskunsthalleTest.java b/oai-client/src/test/java/org/xbib/oai/client/BundeskunsthalleTest.java
index f127cc9..88f97b4 100644
--- a/oai-client/src/test/java/org/xbib/oai/client/BundeskunsthalleTest.java
+++ b/oai-client/src/test/java/org/xbib/oai/client/BundeskunsthalleTest.java
@@ -2,6 +2,7 @@ package org.xbib.oai.client;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.xbib.helianthus.client.Clients;
 import org.xbib.helianthus.client.http.HttpClient;
@@ -37,6 +38,7 @@ public class BundeskunsthalleTest {
     private static final Logger logger = LogManager.getLogger(BundeskunsthalleTest.class.getName());
 
     @Test
+    @Ignore // takes too long time and creates files
     public void testListRecords() throws Exception {
         String spec = "http://www.bundeskunsthalle.de/cgi-bin/bib/oai-pmh";
         try (OAIClient oaiClient = new OAIClient().setURL(new URL(spec), true)) {
diff --git a/oai-client/src/test/java/org/xbib/oai/client/DOAJClientTest.java b/oai-client/src/test/java/org/xbib/oai/client/DOAJClientTest.java
index 311b376..4d14a79 100644
--- a/oai-client/src/test/java/org/xbib/oai/client/DOAJClientTest.java
+++ b/oai-client/src/test/java/org/xbib/oai/client/DOAJClientTest.java
@@ -38,6 +38,7 @@ public class DOAJClientTest {
     private static final Logger logger = LogManager.getLogger(DOAJClientTest.class.getName());
 
     @Test
+    @Ignore // takes too long time
     public void testListRecordsDOAJ() throws Exception {
         // will redirect to https://doaj.org/oai
         try (OAIClient oaiClient = new OAIClient().setURL(new URL("http://doaj.org/oai"), true)) {
diff --git a/oai-common/src/main/java/org/xbib/oai/xml/XmlSimpleMetadataHandler.java b/oai-common/src/main/java/org/xbib/oai/xml/XmlSimpleMetadataHandler.java
index dd21c58..9471135 100644
--- a/oai-common/src/main/java/org/xbib/oai/xml/XmlSimpleMetadataHandler.java
+++ b/oai-common/src/main/java/org/xbib/oai/xml/XmlSimpleMetadataHandler.java
@@ -9,7 +9,6 @@ import java.io.Writer;
 import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.Deque;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -38,7 +37,7 @@ public class XmlSimpleMetadataHandler extends SimpleMetadataHandler implements O
 
     private List<String> namespaces = new ArrayList<>();
 
-    private Deque<Collection<?>> nsStack = new ArrayDeque<>();
+    private Deque<Collection<Namespace>> nsStack = new ArrayDeque<>();
 
     private Locator locator;
 
@@ -92,7 +91,7 @@ public class XmlSimpleMetadataHandler extends SimpleMetadataHandler implements O
     }
 
     @Override
-    public void startDocument() throws SAXException {
+    public void startDocument() {
         if (eventWriter == null) {
             return;
         }
@@ -119,7 +118,7 @@ public class XmlSimpleMetadataHandler extends SimpleMetadataHandler implements O
     }
 
     @Override
-    public void startPrefixMapping(String prefix, String namespaceURI) throws SAXException {
+    public void startPrefixMapping(String prefix, String namespaceURI) {
         if (eventWriter == null) {
             return;
         }
@@ -138,7 +137,7 @@ public class XmlSimpleMetadataHandler extends SimpleMetadataHandler implements O
     }
 
     @Override
-    public void endPrefixMapping(String string) throws SAXException {
+    public void endPrefixMapping(String string) {
         // not used
     }
 
@@ -155,15 +154,16 @@ public class XmlSimpleMetadataHandler extends SimpleMetadataHandler implements O
             }
             needToCallStartDocument = false;
         }
-        Collection<?>[] events = {null, null};
-        createStartEvents(attributes, events);
-        nsStack.add(events[0]);
+        Collection<Attribute> attr = new ArrayList<>();
+        Collection<Namespace> ns = new ArrayList<>();
+        createStartEvents(attributes, attr, ns);
+        nsStack.add(ns);
         try {
             String[] q = {null, null};
             parseQName(qname, q);
             eventFactory.setLocation(getCurrentLocation());
             eventWriter.add(eventFactory.createStartElement(q[0], uri,
-                    q[1], events[1].iterator(), events[0].iterator()));
+                    q[1], attr.iterator(), ns.iterator()));
         } catch (XMLStreamException e) {
             throw new SAXException(e);
         }
@@ -176,8 +176,7 @@ public class XmlSimpleMetadataHandler extends SimpleMetadataHandler implements O
         }
         String[] q = {null, null};
         parseQName(qname, q);
-        Collection<?> nsList = nsStack.getLast();
-        Iterator<?> nsIter = nsList.iterator();
+        Iterator<Namespace> nsIter = nsStack.getLast().iterator();
         try {
             eventFactory.setLocation(getCurrentLocation());
             eventWriter.add(eventFactory.createEndElement(q[0], uri, q[1], nsIter));
@@ -199,7 +198,7 @@ public class XmlSimpleMetadataHandler extends SimpleMetadataHandler implements O
         }
     }
 
-    private void createStartEvents(Attributes attributes, Collection<?>[] events) {
+    private void createStartEvents(Attributes attributes, Collection<Attribute> attrList, Collection<Namespace> nsList) {
         Map<String, Namespace> nsMap = null;
         List<Attribute> attrs = null;
         if (namespaces != null) {
@@ -241,8 +240,12 @@ public class XmlSimpleMetadataHandler extends SimpleMetadataHandler implements O
                 attrs.add(attribute);
             }
         }
-        events[0] = nsMap == null ? Collections.emptyList() : nsMap.values();
-        events[1] = attrs == null ? Collections.emptyList() : attrs;
+        if (nsMap != null) {
+            nsList.addAll(nsMap.values());
+        }
+        if (attrs != null) {
+            attrList.addAll(attrs);
+        }
     }
 
     private void parseQName(String qName, String[] results) {
diff --git a/oai-server/build.gradle b/oai-server/build.gradle
index 867ba01..48725cc 100644
--- a/oai-server/build.gradle
+++ b/oai-server/build.gradle
@@ -1,4 +1,4 @@
 dependencies {
     compile project(':oai-common')
-    compile "org.xbib.helianthus:helianthus-server:1.0.3"
+    compile "org.xbib.helianthus:helianthus-server:${project.property('helianthus.version')}"
 }
\ No newline at end of file
diff --git a/oai-server/src/main/java/org/xbib/oai/server/verb/AbstractVerb.java b/oai-server/src/main/java/org/xbib/oai/server/verb/AbstractVerb.java
index bb27c90..320e743 100644
--- a/oai-server/src/main/java/org/xbib/oai/server/verb/AbstractVerb.java
+++ b/oai-server/src/main/java/org/xbib/oai/server/verb/AbstractVerb.java
@@ -2,15 +2,16 @@ package org.xbib.oai.server.verb;
 
 import org.xbib.oai.OAIConstants;
 import org.xbib.oai.exceptions.OAIException;
-import org.xbib.oai.server.OAIServer;
 import org.xbib.oai.server.AbstractOAIRequest;
 import org.xbib.oai.server.AbstractOAIResponse;
+import org.xbib.oai.server.OAIServer;
 
 import java.net.URL;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Map;
 import java.util.TimeZone;
+
 import javax.xml.namespace.QName;
 import javax.xml.stream.XMLEventFactory;
 import javax.xml.stream.XMLStreamException;
diff --git a/oai-server/src/main/java/org/xbib/oai/server/verb/ListMetadataFormats.java b/oai-server/src/main/java/org/xbib/oai/server/verb/ListMetadataFormats.java
index 72d3cad..20e03d7 100644
--- a/oai-server/src/main/java/org/xbib/oai/server/verb/ListMetadataFormats.java
+++ b/oai-server/src/main/java/org/xbib/oai/server/verb/ListMetadataFormats.java
@@ -1,9 +1,9 @@
 package org.xbib.oai.server.verb;
 
 import org.xbib.oai.exceptions.OAIException;
-import org.xbib.oai.server.OAIServer;
 import org.xbib.oai.server.AbstractOAIRequest;
 import org.xbib.oai.server.AbstractOAIResponse;
+import org.xbib.oai.server.OAIServer;
 
 /**
  *