diff --git a/ipyaladin/aladin_widget.py b/ipyaladin/aladin_widget.py
index 7e45d107..c46fa894 100644
--- a/ipyaladin/aladin_widget.py
+++ b/ipyaladin/aladin_widget.py
@@ -172,16 +172,6 @@ def __init__(self, **kwargs):
         # see: http://jupyter-notebook.readthedocs.io/en/latest/comms.html
         self.on_msg(self.handle_aladin_event)
 
-    @observe("height")
-    def _immutable_height(self, change):
-        """Inform the users that height is immutable outside of instantiation.
-        """
-        # change["old"] is None when doing the instantiation, and has an other value
-        # at every other times
-        if change["old"] != None:
-            raise UserWarning("height cannot be changed outside of the instantiation"
-                              " of an Aladin() object.")
-
     # Note: (about the classe's functions)
     # As it is only possible to communicate with the js side of the application by using traitlets,
     # we can not directly call a js function from the python side
diff --git a/js/lib/jupyter-aladin.js b/js/lib/jupyter-aladin.js
index 5883ce41..a0087443 100644
--- a/js/lib/jupyter-aladin.js
+++ b/js/lib/jupyter-aladin.js
@@ -184,6 +184,10 @@ export class AladinView extends DOMWidgetView {
         this.listenTo(this.model, 'change:coo_frame', () => {
             this.al.setFrame(this.model.get('coo_frame'));
         }, this);
+        this.listenTo(this.model, 'change:height', () => {
+            let height = this.model.get('height');
+            this.div.setAttribute("style","width:100%;height:" + height + "px;");
+        }, this);
         this.listenTo(this.model, 'change:survey', () => {
             this.al.setImageSurvey(this.model.get('survey'));
         }, this);