diff --git a/dmp-backend/pom.xml b/dmp-backend/pom.xml
index cb515c253..deaaf8885 100644
--- a/dmp-backend/pom.xml
+++ b/dmp-backend/pom.xml
@@ -35,7 +35,7 @@
         <org.apache.tomcat.tomcat-jdbc.version>7.0.35</org.apache.tomcat.tomcat-jdbc.version>
         <com.fasterxml.jackson>2.8.4</com.fasterxml.jackson>
 
-        <hibernate.version>5.4.2.Final</hibernate.version>
+        <hibernate.version>5.2.11.Final</hibernate.version>
 
         <commons-codec.version>1.9</commons-codec.version>
         <org.junit.version>4.11</org.junit.version>
diff --git a/dmp-backend/queryable/src/main/java/eu/eudat/queryable/jpa/hibernatequeryablelist/QueryableHibernateList.java b/dmp-backend/queryable/src/main/java/eu/eudat/queryable/jpa/hibernatequeryablelist/QueryableHibernateList.java
index e51a9a4d2..cb2f44ce8 100644
--- a/dmp-backend/queryable/src/main/java/eu/eudat/queryable/jpa/hibernatequeryablelist/QueryableHibernateList.java
+++ b/dmp-backend/queryable/src/main/java/eu/eudat/queryable/jpa/hibernatequeryablelist/QueryableHibernateList.java
@@ -255,6 +255,7 @@ public class QueryableHibernateList<T extends DataEntity> implements QueryableLi
 		else return this.toListAsyncWithOutFields();
 	}
 
+	@Async
 	private CompletableFuture<List<T>> toListAsyncWithFields() {
 		List<Tuple> results = this.manager.createQuery(query).getResultList();
 		Map<Object, List<Tuple>> groupedResults = results.stream()
@@ -269,6 +270,7 @@ public class QueryableHibernateList<T extends DataEntity> implements QueryableLi
 		}).collect(Collectors.toList()));
 	}
 
+	@Async
 	private CompletableFuture<List<T>> toListAsyncWithOutFields() {
 		TypedQuery<T> typedQuery = this.manager.createQuery(this.query);
 		if (this.offset != null) typedQuery.setFirstResult(this.offset);