diff --git a/pom.xml b/pom.xml
index 267f1f6af8596cec17b760cf4f55baa1ac33bf9c..89a8bddacb823aab46f4d804532edae7082c7268 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,7 +47,7 @@
         <spring-data-jpa.version>1.10.11.RELEASE</spring-data-jpa.version>
         <spring-boot-starter-actuator.version>1.4.7.RELEASE</spring-boot-starter-actuator.version>
         <aspectjweaver.version>1.8.9</aspectjweaver.version>
-        <woken-messages.version>2.8.0</woken-messages.version>
+        <woken-messages.version>2.8.1</woken-messages.version>
         <javax-inject.version>1</javax-inject.version>
         <akka.version>2.5.12</akka.version>
         <spring-context.version>4.3.4.RELEASE</spring-context.version>
diff --git a/src/main/java/eu/hbp/mip/model/Experiment.java b/src/main/java/eu/hbp/mip/model/Experiment.java
index 2ffe3196fef780d2c897663af2f42e864cb24eca..5a3772616388e9b479cc8d95e7a8c6912d081245 100644
--- a/src/main/java/eu/hbp/mip/model/Experiment.java
+++ b/src/main/java/eu/hbp/mip/model/Experiment.java
@@ -103,7 +103,7 @@ public class Experiment {
         Type algoList = new TypeToken<LinkedList<eu.hbp.mip.model.Algorithm>>(){}.getType();
         List<eu.hbp.mip.model.Algorithm> algos = new Gson().fromJson(this.algorithms, algoList);
         for (eu.hbp.mip.model.Algorithm a: algos) {
-            algorithms.add(new AlgorithmSpec(a.getCode(), TypesConvert.algoParamsToScala(a.getParameters())));
+            algorithms.add(new AlgorithmSpec(a.getCode(), TypesConvert.algoParamsToScala(a.getParameters()), Option.empty()));
         }
 
         List<ValidationSpec> validations = new LinkedList<>();
diff --git a/src/main/java/eu/hbp/mip/model/MiningQuery.java b/src/main/java/eu/hbp/mip/model/MiningQuery.java
index 51cb91c3a7dc033c247be43617e0ed168ed1d39b..908ef52193221feec68520c88662d9e3ac7b5b56 100644
--- a/src/main/java/eu/hbp/mip/model/MiningQuery.java
+++ b/src/main/java/eu/hbp/mip/model/MiningQuery.java
@@ -90,7 +90,7 @@ public class MiningQuery {
     public ch.chuv.lren.woken.messages.query.MiningQuery prepareQuery(String user) {
 
         ch.chuv.lren.woken.messages.query.AlgorithmSpec scalaAlgorithm = new ch.chuv.lren.woken.messages.query.AlgorithmSpec(
-                algorithm.getCode(), TypesConvert.algoParamsToScala(algorithm.getParameters()));
+                algorithm.getCode(), TypesConvert.algoParamsToScala(algorithm.getParameters()), Option.empty());
 
         scala.collection.immutable.List<FeatureIdentifier> variablesSeq =
                 TypesConvert.variablesToIdentifiers(getVariables());