diff --git a/web_tree_image/__manifest__.py b/web_tree_image/__manifest__.py
index eb43f3508..e7c98d602 100644
--- a/web_tree_image/__manifest__.py
+++ b/web_tree_image/__manifest__.py
@@ -8,7 +8,7 @@
 
 {
     'name': 'Show images in tree views',
-    'version': '11.0.1.0.0',
+    'version': '12.0.1.0.0',
     'author': "Therp BV, "
               "MONK Software, "
               "Odoo Community Association (OCA), "
diff --git a/web_tree_image/static/src/js/tooltip.js b/web_tree_image/static/src/js/tooltip.js
index a4a967bd0..a39f9afc0 100644
--- a/web_tree_image/static/src/js/tooltip.js
+++ b/web_tree_image/static/src/js/tooltip.js
@@ -2,13 +2,12 @@ odoo.define('web_tree_image.web_tree_image', function(require) {
 "use strict";
 
 var ListRenderer = require('web.ListRenderer');
-
 	ListRenderer.include({
 	    events: _.extend({}, ListRenderer.prototype.events, {
 	    	'mouseover tbody tr td .o_field_image': '_onHoverRecord_img',
 	    }),
 		_onHoverRecord_img: function (event) {
-			var img_src = $(event.currentTarget).children('.img-responsive').attr('src')
+			var img_src = $(event.currentTarget).children('.img-fluid').attr('src')
 	    	$(event.currentTarget).tooltip({
 	    		title: "<img src="+img_src+" />",
 	    		delay: 0,
diff --git a/web_tree_image/static/src/less/common.less b/web_tree_image/static/src/scss/common.scss
similarity index 100%
rename from web_tree_image/static/src/less/common.less
rename to web_tree_image/static/src/scss/common.scss
diff --git a/web_tree_image/view/assets.xml b/web_tree_image/view/assets.xml
index 9d40ab470..8db1946a1 100644
--- a/web_tree_image/view/assets.xml
+++ b/web_tree_image/view/assets.xml
@@ -3,7 +3,7 @@
 
     <template id="assets_backend" name="tree icon assets" inherit_id="web.assets_backend">
         <xpath expr="." position="inside">
-            <link rel='stylesheet' href='/web_tree_image/static/src/less/common.less'/>
+            <link rel='stylesheet' href='/web_tree_image/static/src/scss/common.scss'/>
             <script type="text/javascript" src="/web_tree_image/static/src/js/tooltip.js"/>
         </xpath>
     </template>