diff --git a/kfet/templates/kfet/history.html b/kfet/templates/kfet/history.html
index 97a0e413..eacd6e73 100644
--- a/kfet/templates/kfet/history.html
+++ b/kfet/templates/kfet/history.html
@@ -7,6 +7,7 @@
 <link rel="stylesheet" type="text/css" href="{% static 'kfet/css/bootstrap-datetimepicker.min.css' %}">
 <link rel="stylesheet" type="text/css" href="{% static 'kfet/css/multiple-select.css' %}">
 <script type="text/javascript" src="{% static 'kfet/js/js.cookie.js' %}"></script>
+<script type="text/javascript" src="{% static 'kfet/js/reconnecting-websocket.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/jquery-ui.min.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/jquery-confirm.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/moment.js' %}"></script>
@@ -223,6 +224,35 @@ $(document).ready(function() {
         });
     }
 
+    // -----
+    // Synchronization
+    // -----
+
+
+    websocket_msg_default = {'opegroups':[],'opes':[]}
+
+    var websocket_protocol = window.location.protocol == 'https:' ? 'wss' : 'ws';
+    var location_host = window.location.host;
+    var location_url = window.location.pathname.startsWith('/gestion/') ? location_host + '/gestion' : location_host;
+    socket = new ReconnectingWebSocket(websocket_protocol+"://" + location_url + "/ws/k-fet/k-psul/");
+    socket.onmessage = function(e) {
+        data = $.extend({}, websocket_msg_default, JSON.parse(e.data));
+
+        for (var i=0; i<data['opegroups'].length; i++) {
+            if (data['opegroups'][i]['add'] && 
+                moment(data['opegroups'][i]['at']).isBefore(moment($to_date.val()).add(15, 'minutes'))) {
+                khistory.addOpeGroup(data['opegroups'][i]);
+            } else if (data['opegroups'][i]['cancellation']) {
+                khistory.cancelOpeGroup(data['opegroups'][i]);
+            }
+        }
+        for (var i=0; i<data['opes'].length; i++) {
+            if (data['opes'][i]['cancellation']) {
+                khistory.cancelOpe(data['opes'][i]);
+            }
+        }
+    }
+
 
     getHistory();
 });
diff --git a/kfet/templates/kfet/transfers.html b/kfet/templates/kfet/transfers.html
index 0ba0c85e..a580709f 100644
--- a/kfet/templates/kfet/transfers.html
+++ b/kfet/templates/kfet/transfers.html
@@ -4,6 +4,7 @@
 {% block extra_head %}
 <link rel="stylesheet" style="text/css" href="{% static 'kfet/css/jquery-ui.min.css' %}">
 <script type="text/javascript" src="{% static 'kfet/js/js.cookie.js' %}"></script>
+<script type="text/javascript" src="{% static 'kfet/js/reconnecting-websocket.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/jquery-ui.min.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/jquery-confirm.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/moment.js' %}"></script>
@@ -162,6 +163,27 @@ $(document).ready(function() {
         });
     }
 
+    // -----
+    // Synchronization
+    // -----
+
+
+    websocket_msg_default = {'opes':[]}
+
+    var websocket_protocol = window.location.protocol == 'https:' ? 'wss' : 'ws';
+    var location_host = window.location.host;
+    var location_url = window.location.pathname.startsWith('/gestion/') ? location_host + '/gestion' : location_host;
+    socket = new ReconnectingWebSocket(websocket_protocol+"://" + location_url + "/ws/k-fet/k-psul/");
+    socket.onmessage = function(e) {
+        data = $.extend({}, websocket_msg_default, JSON.parse(e.data));
+
+        for (var i=0; i<data['opes'].length; i++) {
+            if (data['opes'][i]['cancellation']) {
+                khistory.cancelOpe(data['opes'][i]);
+            }
+        }
+    }
+
     getHistory();
 
 });