diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/complete/CreateContextEntities.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/complete/CreateContextEntities.java
index 23224f8db..ccb84c713 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/complete/CreateContextEntities.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/complete/CreateContextEntities.java
@@ -1,22 +1,25 @@
 
 package eu.dnetlib.dhp.oa.graph.dump.complete;
 
-import java.io.BufferedWriter;
-import java.io.IOException;
-import java.io.OutputStreamWriter;
-import java.io.Serializable;
+import java.io.*;
 import java.nio.charset.StandardCharsets;
 import java.util.function.Consumer;
 import java.util.function.Function;
 
+import org.apache.commons.crypto.utils.IoUtils;
 import org.apache.commons.io.IOUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.io.compress.CompressionCodec;
+import org.apache.hadoop.io.compress.CompressionCodecFactory;
+import org.apache.hadoop.io.compress.CompressionOutputStream;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+
 import eu.dnetlib.dhp.application.ArgumentApplicationParser;
 import eu.dnetlib.dhp.oa.graph.dump.Utils;
 import eu.dnetlib.dhp.schema.dump.oaf.graph.ResearchInitiative;
@@ -76,8 +79,11 @@ public class CreateContextEntities implements Serializable {
 		} else {
 			fsDataOutputStream = fileSystem.create(hdfsWritePath);
 		}
+		CompressionCodecFactory factory = new CompressionCodecFactory(conf);
+		CompressionCodec codec = factory.getCodecByClassName("org.apache.hadoop.io.compress.GzipCodec");
 
-		this.writer = new BufferedWriter(new OutputStreamWriter(fsDataOutputStream, StandardCharsets.UTF_8));
+		this.writer = new BufferedWriter(new OutputStreamWriter(codec.createOutputStream(fsDataOutputStream),
+			StandardCharsets.UTF_8));
 
 	}