diff --git a/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/Crossref2Oaf.scala b/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/Crossref2Oaf.scala
index 3f6a26c46..15a321431 100644
--- a/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/Crossref2Oaf.scala
+++ b/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/Crossref2Oaf.scala
@@ -16,9 +16,10 @@ import scala.collection.JavaConverters._
 import scala.collection.mutable
 import scala.util.matching.Regex
 import eu.dnetlib.dhp.schema.scholexplorer.OafUtils
-
 import java.util
 
+import eu.dnetlib.doiboost.DoiBoostMappingUtil
+
 case class CrossrefDT(doi: String, json:String, timestamp: Long) {}
 
 case class mappingAffiliation(name: String) {}
@@ -89,7 +90,7 @@ case object Crossref2Oaf {
     implicit lazy val formats: DefaultFormats.type = org.json4s.DefaultFormats
 
     //MAPPING Crossref DOI into PID
-    val doi: String = (json \ "DOI").extract[String]
+    val doi: String = DoiBoostMappingUtil.normalizeDoi((json \ "DOI").extract[String])
     result.setPid(List(createSP(doi, "doi", ModelConstants.DNET_PID_TYPES)).asJava)
 
     //MAPPING Crossref DOI into OriginalId
@@ -101,6 +102,7 @@ case object Crossref2Oaf {
     val originalIds = new util.ArrayList(tmp.filter(id => id != null).asJava)
     result.setOriginalId(originalIds)
 
+
     // Add DataInfo
     result.setDataInfo(generateDataInfo())
 
diff --git a/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/CrossrefDataset.scala b/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/CrossrefDataset.scala
index 4a39a2987..159b817c7 100644
--- a/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/CrossrefDataset.scala
+++ b/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/CrossrefDataset.scala
@@ -1,6 +1,7 @@
 package eu.dnetlib.doiboost.crossref
 
 import eu.dnetlib.dhp.application.ArgumentApplicationParser
+import eu.dnetlib.doiboost.DoiBoostMappingUtil
 import org.apache.commons.io.IOUtils
 import org.apache.hadoop.io.{IntWritable, Text}
 import org.apache.spark.SparkConf
@@ -21,7 +22,7 @@ object CrossrefDataset {
     implicit lazy val formats: DefaultFormats.type = org.json4s.DefaultFormats
     lazy val json: json4s.JValue = parse(input)
     val ts:Long = (json \ "indexed" \ "timestamp").extract[Long]
-    val doi:String  = (json \ "DOI").extract[String]
+    val doi:String  = DoiBoostMappingUtil.normalizeDoi((json \ "DOI").extract[String])
     CrossrefDT(doi, input, ts)
 
   }
diff --git a/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/GenerateCrossrefDataset.scala b/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/GenerateCrossrefDataset.scala
index b11e2d8de..526ff7b3a 100644
--- a/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/GenerateCrossrefDataset.scala
+++ b/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/crossref/GenerateCrossrefDataset.scala
@@ -1,6 +1,7 @@
 package eu.dnetlib.doiboost.crossref
 
 import eu.dnetlib.dhp.application.ArgumentApplicationParser
+import eu.dnetlib.doiboost.DoiBoostMappingUtil
 import eu.dnetlib.doiboost.crossref.CrossrefDataset.to_item
 import eu.dnetlib.doiboost.crossref.UnpackCrtossrefEntries.getClass
 import org.apache.hadoop.io.{IntWritable, Text}
@@ -27,7 +28,7 @@ object GenerateCrossrefDataset {
   def crossrefElement(meta: String): CrossrefDT = {
     implicit lazy val formats: DefaultFormats.type = org.json4s.DefaultFormats
     lazy val json: json4s.JValue = parse(meta)
-    val doi:String = (json \ "DOI").extract[String]
+    val doi:String = DoiBoostMappingUtil.normalizeDoi((json \ "DOI").extract[String])
     val timestamp: Long = (json \ "indexed" \ "timestamp").extract[Long]
     CrossrefDT(doi, meta, timestamp)