diff --git a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/problem/solution/route/VehicleRoute.java b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/problem/solution/route/VehicleRoute.java
index 40fe5907..ee14a75f 100644
--- a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/problem/solution/route/VehicleRoute.java
+++ b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/problem/solution/route/VehicleRoute.java
@@ -367,7 +367,7 @@ public class VehicleRoute {
      * @return list of tourActivities
      */
     public List<TourActivity> getActivities() {
-        return Collections.unmodifiableList(tourActivities.getActivities());
+        return tourActivities.getActivities();
     }
 
     /**