diff --git a/src/main/java/lu/jpt/csparqlproject/rentacar/RentACarSimulation.java b/src/main/java/lu/jpt/csparqlproject/rentacar/RentACarSimulation.java
index cbb7d13..0677311 100644
--- a/src/main/java/lu/jpt/csparqlproject/rentacar/RentACarSimulation.java
+++ b/src/main/java/lu/jpt/csparqlproject/rentacar/RentACarSimulation.java
@@ -427,7 +427,7 @@ public class RentACarSimulation implements Runnable {
 				+ "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> "
 				+ "PREFIX car: <"+RentACarSimulation.BASE_ONTOLOGY_IRI+"> "
 				+ "SELECT ?driver ?car "
-				+ "FROM STREAM <"+RentACarSimulation.DRIVER_STREAM_IRI+"> [RANGE 3s STEP 1s] "
+				+ "FROM STREAM <"+RentACarSimulation.DRIVER_STREAM_IRI+"> [RANGE 2s TUMBLING] "
 				+ "WHERE { "
 				+ " ?e rdf:type car:CarTakenEvent . "
 				+ " ?e car:relatedCar ?car . "
@@ -471,7 +471,7 @@ public class RentACarSimulation implements Runnable {
 				+ "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> "
 				+ "PREFIX car: <"+RentACarSimulation.BASE_ONTOLOGY_IRI+"> "
 				+ "SELECT ?driver ?car "
-				+ "FROM STREAM <"+RentACarSimulation.DRIVER_STREAM_IRI+"> [RANGE 3s STEP 1s] "
+				+ "FROM STREAM <"+RentACarSimulation.DRIVER_STREAM_IRI+"> [RANGE 2s TUMBLING] "
 				+ "WHERE { "
 				+ " ?e rdf:type car:CarReturnedEvent . "
 				+ " ?e car:relatedCar ?car . "