diff --git a/src/main/java/org/gcube/spatial/data/geoutility/bean/LayerZAxis.java b/src/main/java/org/gcube/spatial/data/geoutility/bean/LayerZAxis.java
index 61fbd03..f58a5d8 100644
--- a/src/main/java/org/gcube/spatial/data/geoutility/bean/LayerZAxis.java
+++ b/src/main/java/org/gcube/spatial/data/geoutility/bean/LayerZAxis.java
@@ -25,7 +25,7 @@ public class LayerZAxis implements Serializable{
 
 	private String units;
 	private boolean positive;
-	private List<Integer> values;
+	private List<Long> values;
 
 	/**
 	 * Instantiates a new layer z axis.
@@ -40,7 +40,7 @@ public class LayerZAxis implements Serializable{
 	 * @param positive the positive
 	 * @param values the values
 	 */
-	public LayerZAxis(String units, boolean positive, List<Integer> values) {
+	public LayerZAxis(String units, boolean positive, List<Long> values) {
 		this.units = units;
 		this.positive = positive;
 		this.values = values;
@@ -74,7 +74,7 @@ public class LayerZAxis implements Serializable{
 	 *
 	 * @return the values
 	 */
-	public List<Integer> getValues() {
+	public List<Long> getValues() {
 
 		return values;
 	}
@@ -107,7 +107,7 @@ public class LayerZAxis implements Serializable{
 	 *
 	 * @param values the values to set
 	 */
-	public void setValues(List<Integer> values) {
+	public void setValues(List<Long> values) {
 
 		this.values = values;
 	}
diff --git a/src/main/java/org/gcube/spatial/data/geoutility/wms/NcWmsGetMetadata.java b/src/main/java/org/gcube/spatial/data/geoutility/wms/NcWmsGetMetadata.java
index 574dfe2..f0be3e4 100644
--- a/src/main/java/org/gcube/spatial/data/geoutility/wms/NcWmsGetMetadata.java
+++ b/src/main/java/org/gcube/spatial/data/geoutility/wms/NcWmsGetMetadata.java
@@ -17,8 +17,8 @@ import java.util.List;
 
 import org.apache.commons.io.IOUtils;
 import org.apache.log4j.Logger;
-import org.gcube.spatial.data.geoutility.bean.NcWmsLayerMetadata;
 import org.gcube.spatial.data.geoutility.bean.LayerZAxis;
+import org.gcube.spatial.data.geoutility.bean.NcWmsLayerMetadata;
 import org.gcube.spatial.data.geoutility.bean.NcWmsLayerMetadata.METADATA;
 import org.gcube.spatial.data.geoutility.bean.WmsParameters;
 import org.gcube.spatial.data.geoutility.util.UrlEncoderUtil;
@@ -210,9 +210,9 @@ public class NcWmsGetMetadata {
 					JSONArray values = zaxis.getJSONArray(LayerZAxis.VALUES);
 					System.out.println(values);
 					if(values!=null){
-						List<Integer> s = new ArrayList<Integer>(values.length());
+						List<Long> s = new ArrayList<Long>(values.length());
 						for (int i=0; i<values.length(); i++) {
-							s.add(values.getInt(i));
+							s.add(values.getLong(i));
 						}
 						zAxis.setValues(s);
 					}