diff --git a/dnet-pace-core/pom.xml b/dnet-pace-core/pom.xml
index 2d07fb2..dfe9705 100644
--- a/dnet-pace-core/pom.xml
+++ b/dnet-pace-core/pom.xml
@@ -59,10 +59,17 @@
org.reflections
reflections
+
- org.apache.spark
- spark-core_2.11
+ com.fasterxml.jackson.core
+ jackson-databind
+
+ org.codehaus.jackson
+ jackson-mapper-asl
+
+
+
diff --git a/dnet-pace-core/src/main/java/eu/dnetlib/pace/common/AbstractPaceFunctions.java b/dnet-pace-core/src/main/java/eu/dnetlib/pace/common/AbstractPaceFunctions.java
index 9fa67d7..d07b197 100644
--- a/dnet-pace-core/src/main/java/eu/dnetlib/pace/common/AbstractPaceFunctions.java
+++ b/dnet-pace-core/src/main/java/eu/dnetlib/pace/common/AbstractPaceFunctions.java
@@ -1,26 +1,22 @@
package eu.dnetlib.pace.common;
-import java.text.Normalizer;
-import java.util.*;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-import com.google.common.collect.Maps;
-import eu.dnetlib.pace.distance.algo.JaroWinklerNormalizedName;
-import org.apache.commons.collections.CollectionUtils;
-import org.apache.commons.io.IOUtils;
-import org.apache.commons.lang.StringUtils;
-
import com.google.common.base.Joiner;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
-
import eu.dnetlib.pace.clustering.NGramUtils;
+import eu.dnetlib.pace.distance.algo.JaroWinklerNormalizedName;
import eu.dnetlib.pace.model.Field;
import eu.dnetlib.pace.model.FieldList;
import eu.dnetlib.pace.model.FieldListImpl;
-import org.apache.spark.util.CollectionsUtils;
+import org.apache.commons.collections.CollectionUtils;
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang.StringUtils;
+
+import java.text.Normalizer;
+import java.util.*;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
/**
* Set of common functions
diff --git a/pom.xml b/pom.xml
index b89705d..5101f00 100644
--- a/pom.xml
+++ b/pom.xml
@@ -125,6 +125,17 @@
6.2.18
+
+ com.fasterxml.jackson.core
+ jackson-databind
+ 2.6.6
+
+
+ org.codehaus.jackson
+ jackson-mapper-asl
+ 1.9.13
+
+
com.google.guava