diff --git a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/datacite/ImportDatacite.scala b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/datacite/ImportDatacite.scala
index d6101ba7a9..931ac06f64 100644
--- a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/datacite/ImportDatacite.scala
+++ b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/datacite/ImportDatacite.scala
@@ -56,6 +56,7 @@ object ImportDatacite {
     val hdfsTargetPath = new Path(targetPath)
     log.info(s"hdfsTargetPath is $hdfsTargetPath")
 
+    val bs = if (parser.get("blocksize") == null) 100 else parser.get("blocksize").toInt
 
     val spkipImport = parser.get("skipImport")
     log.info(s"skipImport is $spkipImport")
@@ -110,7 +111,7 @@ object ImportDatacite {
 
     println(s"last Timestamp is $ts")
 
-    val cnt = if ("true".equalsIgnoreCase(spkipImport)) 1 else writeSequenceFile(hdfsTargetPath, ts, conf)
+    val cnt = if ("true".equalsIgnoreCase(spkipImport)) 1 else writeSequenceFile(hdfsTargetPath, ts, conf, bs)
 
     println(s"Imported from Datacite API $cnt documents")
 
@@ -137,7 +138,7 @@ object ImportDatacite {
     }
   }
 
-  private def writeSequenceFile(hdfsTargetPath: Path, timestamp: Long, conf: Configuration): Long = {
+  private def writeSequenceFile(hdfsTargetPath: Path, timestamp: Long, conf: Configuration, bs:Int): Long = {
     var from:Long = timestamp * 1000
     val delta:Long = 50000000L
     var client: DataciteAPIImporter = null
@@ -148,7 +149,7 @@ object ImportDatacite {
       try {
         var start: Long = System.currentTimeMillis
         while (from < now) {
-          client = new DataciteAPIImporter(from, 100, from + delta)
+          client = new DataciteAPIImporter(from, bs, from + delta)
           var end: Long = 0
           val key: IntWritable = new IntWritable(i)
           val value: Text = new Text
diff --git a/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/actionmanager/datacite/import_from_api.json b/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/actionmanager/datacite/import_from_api.json
index 69fb039ba8..a37ae4bba0 100644
--- a/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/actionmanager/datacite/import_from_api.json
+++ b/dhp-workflows/dhp-aggregation/src/main/resources/eu/dnetlib/dhp/actionmanager/datacite/import_from_api.json
@@ -18,6 +18,12 @@
     "paramDescription": "avoid to downlaod new items but apply the previous update",
     "paramRequired": false
   },
+  {
+    "paramName": "bs",
+    "paramLongName": "blocksize",
+    "paramDescription": "define the requests block size",
+    "paramRequired": false
+  },
   {
     "paramName": "n",
     "paramLongName": "namenode",