diff --git a/src/main/java/org/cloudsimplus/testbeds/sla/taskcompletiontime/CloudletTaskCompletionTimeWithoutMinimizationExperiment.java b/src/main/java/org/cloudsimplus/testbeds/sla/taskcompletiontime/CloudletTaskCompletionTimeWithoutMinimizationExperiment.java
index ece2f20..54ccd38 100644
--- a/src/main/java/org/cloudsimplus/testbeds/sla/taskcompletiontime/CloudletTaskCompletionTimeWithoutMinimizationExperiment.java
+++ b/src/main/java/org/cloudsimplus/testbeds/sla/taskcompletiontime/CloudletTaskCompletionTimeWithoutMinimizationExperiment.java
@@ -70,7 +70,7 @@ private CloudletTaskCompletionTimeWithoutMinimizationExperiment(final int index,
         randCloudlet = new UniformDistr(getSeed());
         randVm = new UniformDistr(getSeed()+1);
         this.contract = SlaContract.getInstance(METRICS_FILE);
-        getSimulation().addOnClockTickListener(this::printVmsCpuUsage);
+        getSimulation().listeners().addOnClockTick(this::printVmsCpuUsage);
     }
 
     @Override