diff --git a/navalplanner-gantt-zk/src/main/java/org/zkoss/ganttz/TaskContainer.java b/navalplanner-gantt-zk/src/main/java/org/zkoss/ganttz/TaskContainer.java
index 52e64679c..681c0cfe2 100644
--- a/navalplanner-gantt-zk/src/main/java/org/zkoss/ganttz/TaskContainer.java
+++ b/navalplanner-gantt-zk/src/main/java/org/zkoss/ganttz/TaskContainer.java
@@ -78,6 +78,7 @@ public class TaskContainer extends Task implements AfterCompose {
                 container.close();
             }
             taskList.hideTask(subtask);
+            taskList.redrawDependencies();
         }
     }
 }
\ No newline at end of file
diff --git a/navalplanner-gantt-zk/src/main/java/org/zkoss/ganttz/TaskList.java b/navalplanner-gantt-zk/src/main/java/org/zkoss/ganttz/TaskList.java
index 5c3e7ced0..8e4a4691c 100644
--- a/navalplanner-gantt-zk/src/main/java/org/zkoss/ganttz/TaskList.java
+++ b/navalplanner-gantt-zk/src/main/java/org/zkoss/ganttz/TaskList.java
@@ -22,7 +22,6 @@ import org.zkoss.ganttz.util.WeakReferencedListeners.ListenerNotification;
 import org.zkoss.ganttz.util.zoom.ZoomLevel;
 import org.zkoss.ganttz.util.zoom.ZoomLevelChangedListener;
 import org.zkoss.zk.au.out.AuInvoke;
-import org.zkoss.zk.ui.AbstractComponent;
 import org.zkoss.zk.ui.Component;
 import org.zkoss.zk.ui.event.Event;
 import org.zkoss.zk.ui.event.EventListener;
@@ -253,4 +252,8 @@ public class TaskList extends XulElement implements AfterCompose {
         subtask.setParent(null);
     }
 
+    public void redrawDependencies() {
+        getGanttPanel().getDependencyList().redrawDependencies() ;
+    }
+
 }
\ No newline at end of file
diff --git a/navalplanner-gantt-zk/src/main/resources/web/js/ganttz/task.js b/navalplanner-gantt-zk/src/main/resources/web/js/ganttz/task.js
index 82bce2938..96af5488f 100755
--- a/navalplanner-gantt-zk/src/main/resources/web/js/ganttz/task.js
+++ b/navalplanner-gantt-zk/src/main/resources/web/js/ganttz/task.js
@@ -46,6 +46,9 @@ zkTask.init = function(cmp) {
         var dd = zkTask.getDD(cmp);
         //when the tasks is being dragged the related dependencies are redrawn
         dd.on('dragEvent',function(ev){
+            // Slight overload. It could be more efficent to overwrite the YUI method
+            // that is setting the top property
+            cmp.style.top = "";
             if(cmp['relatedDependencies']){
                 for ( var i = 0; i < cmp.relatedDependencies.length; i++) {
                     zkDependency.draw(cmp.relatedDependencies[i]);
@@ -81,7 +84,7 @@ zkTask.init = function(cmp) {
             zkau.send( {
                 uuid : cmp2.id,
                 cmd : "updateProgress",
-                data : [ cmp2.style.width ],
+                data : [ cmp2.style.width ]
             });
         }, zkTask, true);