diff --git a/dhp-common/src/main/java/eu/dnetlib/dhp/oa/merge/AuthorMerger.java b/dhp-common/src/main/java/eu/dnetlib/dhp/oa/merge/AuthorMerger.java
index 3fa5fcbab..17482c019 100644
--- a/dhp-common/src/main/java/eu/dnetlib/dhp/oa/merge/AuthorMerger.java
+++ b/dhp-common/src/main/java/eu/dnetlib/dhp/oa/merge/AuthorMerger.java
@@ -94,7 +94,13 @@ public class AuthorMerger {
 							if (r.getPid() == null) {
 								r.setPid(new ArrayList<>());
 							}
-							r.getPid().add(a._1());
+
+							// TERRIBLE HACK but for some reason when we create and Array with Arrays.asList,
+							// it creates of fixed size, and the add method raise UnsupportedOperationException at
+							// java.util.AbstractList.add
+							final List<StructuredProperty> tmp = new ArrayList<>(r.getPid());
+							tmp.add(a._1());
+							r.setPid(tmp);
 						}
 					}
 				});
diff --git a/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/SparkGenerateDoiBoost.scala b/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/SparkGenerateDoiBoost.scala
index 772af010f..a29809fc0 100644
--- a/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/SparkGenerateDoiBoost.scala
+++ b/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/SparkGenerateDoiBoost.scala
@@ -1,13 +1,15 @@
 package eu.dnetlib.doiboost
 
 import eu.dnetlib.dhp.application.ArgumentApplicationParser
-import eu.dnetlib.dhp.schema.oaf.{Publication, Relation, Dataset => OafDataset, Organization}
+import eu.dnetlib.dhp.oa.merge.AuthorMerger
+import eu.dnetlib.dhp.schema.oaf.{Organization, Publication, Relation, Dataset => OafDataset}
 import eu.dnetlib.doiboost.mag.ConversionUtil
 import org.apache.commons.io.IOUtils
 import org.apache.spark.SparkConf
 import org.apache.spark.sql.functions.col
 import org.apache.spark.sql.{Dataset, Encoder, Encoders, SaveMode, SparkSession}
 import org.slf4j.{Logger, LoggerFactory}
+
 import scala.collection.JavaConverters._
 
 object SparkGenerateDoiBoost {
@@ -49,6 +51,7 @@ object SparkGenerateDoiBoost {
         val otherPub = item._2._2
         if (otherPub != null) {
           crossrefPub.mergeFrom(otherPub)
+          crossrefPub.setAuthor(AuthorMerger.mergeAuthor(crossrefPub.getAuthor, otherPub.getAuthor))
         }
       }
       crossrefPub