diff --git a/web_responsive/static/src/js/web_responsive.js b/web_responsive/static/src/js/web_responsive.js
index 326252f33..b7607f1b6 100644
--- a/web_responsive/static/src/js/web_responsive.js
+++ b/web_responsive/static/src/js/web_responsive.js
@@ -529,12 +529,31 @@ odoo.define('web_responsive', function (require) {
 
     // DocumentViewer: Add support to maximize/minimize
     DocumentViewer.include({
-        events: _.extend(DocumentViewer.prototype.events, {
+        // Widget 'keydown' and 'keyup' events are only dispatched when
+        // this.$el is active, but now the modal have buttons that can obtain
+        // the focus. For this reason we now listen core events, that are
+        // dispatched every time.
+        events: _.extend(_.omit(DocumentViewer.prototype.events, [
+            'keydown',
+            'keyup',
+        ]), {
             'click .o_maximize_btn': '_onClickMaximize',
             'click .o_minimize_btn': '_onClickMinimize',
             'shown.bs.modal': '_onShownModal',
         }),
 
+        start: function () {
+            core.bus.on('keydown', this, this._onKeydown);
+            core.bus.on('keyup', this, this._onKeyUp);
+            return this._super.apply(this, arguments);
+        },
+
+        destroy: function () {
+            core.bus.off('keydown', this, this._onKeydown);
+            core.bus.off('keyup', this, this._onKeyUp);
+            this._super.apply(this, arguments);
+        },
+
         _onShownModal: function () {
             // Disable auto-focus to allow to use controls in edit mode.
             // This only affects the active modal.