diff --git a/src/backoffice/templates/backoffice/assembly_badges.html b/src/backoffice/templates/backoffice/assembly_badges.html
index 055cb24c9745afa95580f63fc88e993ceded85d3..1c2ffcfc65347ebc6dbf329b5c5cb75055ee99c3 100644
--- a/src/backoffice/templates/backoffice/assembly_badges.html
+++ b/src/backoffice/templates/backoffice/assembly_badges.html
@@ -17,7 +17,7 @@
           {% trans "Badges" %}
           {% if can_manage %}
             <a href="{% url 'backoffice:assembly-create-badge' assembly=assembly.id %}"
-               class="btn btn-sm btn-primary float-right">+</a>
+               class="btn btn-sm btn-primary float-end">+</a>
           {% endif %}
         </div>
         <div class="card-body">
diff --git a/src/backoffice/templates/backoffice/assembly_detail.html b/src/backoffice/templates/backoffice/assembly_detail.html
index 4a5503cc67e4156a54b25351719068f47b0294ea..7a045c3279ffac66ff789e45f378705490c3031c 100644
--- a/src/backoffice/templates/backoffice/assembly_detail.html
+++ b/src/backoffice/templates/backoffice/assembly_detail.html
@@ -10,13 +10,13 @@
     <div class="col-md-10">
       <div class="card border-primary">
         <div class="card-header bg-primary text-white">
-          {% if assembly.is_official %}<span class="badge badge-light float-right">official</span>{% endif %}
+          {% if assembly.is_official %}<span class="badge badge-light float-end">official</span>{% endif %}
           {% if can_manage %}
-            <span class="float-right"><a href="{% url 'backoffice:assembly-edit' pk=assembly.pk %}"
+            <span class="float-end"><a href="{% url 'backoffice:assembly-edit' pk=assembly.pk %}"
    class="btn btn-sm btn-light">{% trans "edit" %}</a></span>
           {% endif %}
           {% if assembly.is_public %}
-            <a class="float-right btn btn-sm btn-info me-2"
+            <a class="float-end btn btn-sm btn-info me-2"
                href="{% hub_absolute 'plainui:assembly' assembly_slug=assembly.slug %}">{% trans "public" %}</a>
           {% endif %}
           {{ assembly.name }}
diff --git a/src/backoffice/templates/backoffice/assembly_events.html b/src/backoffice/templates/backoffice/assembly_events.html
index ec65a69bfd4c9dd41a5dd8d4499dcc22f24118bf..3229cb926bff88470fcbdd91d14cf664501a2857 100644
--- a/src/backoffice/templates/backoffice/assembly_events.html
+++ b/src/backoffice/templates/backoffice/assembly_events.html
@@ -56,7 +56,7 @@
           {% trans "Events" %}
           {% if can_manage %}
             <a href="{% url 'backoffice:assembly-create-event' assembly=assembly.id %}"
-               class="btn btn-sm btn-primary float-right">+</a>
+               class="btn btn-sm btn-primary float-end">+</a>
           {% endif %}
         </div>
         <div class="card-body">
diff --git a/src/backoffice/templates/backoffice/assembly_list_export.html b/src/backoffice/templates/backoffice/assembly_list_export.html
index 62e8176083417b5076af34546906029a6d467518..c8a03c94e06ea44e16478d851b34ad7392f0b375 100644
--- a/src/backoffice/templates/backoffice/assembly_list_export.html
+++ b/src/backoffice/templates/backoffice/assembly_list_export.html
@@ -8,7 +8,7 @@
     <div class="col-md-12">
       <div class="card border-default">
         <div class="card-header bg-default">
-          <span class="float-right">
+          <span class="float-end">
             <form class="form-inline"
                   method="get"
                   action="{% url 'backoffice:assemblieslist' variant=variant %}">
diff --git a/src/backoffice/templates/backoffice/assembly_members_edit.html b/src/backoffice/templates/backoffice/assembly_members_edit.html
index 23fc934277bae33df3af576341da71c29bd09631..8efb61e9d75f0b619227ccc71da5837a17631434 100644
--- a/src/backoffice/templates/backoffice/assembly_members_edit.html
+++ b/src/backoffice/templates/backoffice/assembly_members_edit.html
@@ -41,7 +41,7 @@
           </div>
         {% endfor %}
       </div>
-      <div class="card-footer text-right">
+      <div class="card-footer text-end">
         <button type="submit" class="btn btn-primary">{% trans "assemblyedit_submitbtn" %}</button>
       </div>
     </div>
diff --git a/src/backoffice/templates/backoffice/assembly_room.html b/src/backoffice/templates/backoffice/assembly_room.html
index ac51ff19d1501b8fdcbaf79dcd385b35569f787c..833226b5911e8d68bbab03dde83024b23f48d38e 100644
--- a/src/backoffice/templates/backoffice/assembly_room.html
+++ b/src/backoffice/templates/backoffice/assembly_room.html
@@ -23,11 +23,11 @@
         <div class="card border-default">
           <div class="card-header bg-default">
             {% if assembly.is_public %}
-              <a class="float-right btn btn-sm btn-info"
+              <a class="float-end btn btn-sm btn-info"
                  href="{% hub_absolute 'plainui:room' slug=room.slug %}">{% trans "public" %}</a>
             {% endif %}
             {% if room.id %}
-              <span class="text-muted float-right me-2" style="font-size: 75%;">ID: <strong>{{ room.id }}</strong></span>
+              <span class="text-muted float-end me-2" style="font-size: 75%;">ID: <strong>{{ room.id }}</strong></span>
             {% endif %}
             {% if room.name %}
               {% if room.room_type != 'project' %}
diff --git a/src/backoffice/templates/backoffice/assembly_room_wa.html b/src/backoffice/templates/backoffice/assembly_room_wa.html
index b1626d44d98d23adb7b4ca08b862681fd521a9ee..b258c7a759d4e94e8aba73b2c9cbae7420abf41e 100644
--- a/src/backoffice/templates/backoffice/assembly_room_wa.html
+++ b/src/backoffice/templates/backoffice/assembly_room_wa.html
@@ -26,7 +26,7 @@
       <div class="card border-default">
         <div class="card-header bg-default">
           {% if room.id %}
-            <span class="text-muted float-right" style="font-size: 75%;">ID: <strong>{{ room.id }}</strong></span>
+            <span class="text-muted float-end" style="font-size: 75%;">ID: <strong>{{ room.id }}</strong></span>
           {% endif %}
           {% if room.name %}
             {{ room.get_room_type_display }} {% trans "Room" %} "{{ room.name }}"
diff --git a/src/backoffice/templates/backoffice/assembly_room_wa_linterblock.html b/src/backoffice/templates/backoffice/assembly_room_wa_linterblock.html
index 7a233f0e54a15fa478314a947987636a24667a0b..3bae576a72a4731999699b70a438e9b72ea9cb52 100644
--- a/src/backoffice/templates/backoffice/assembly_room_wa_linterblock.html
+++ b/src/backoffice/templates/backoffice/assembly_room_wa_linterblock.html
@@ -74,7 +74,7 @@
     <h4 class="border-bottom">
       <code class="text-muted">{{ map }}</code>
     </h4>
-    <div class="pl-3">
+    <div class="ps-3">
       {% for category, issues in infos.items %}
         {% if issues|length > 0 %}
           <h5>{{ category }}</h5>
diff --git a/src/backoffice/templates/backoffice/base.html b/src/backoffice/templates/backoffice/base.html
index d87a697a7885c88421fa7fe289a2e3fdcb446ae6..c214f04791530d31c11c4e23e63c001021fe2f91 100644
--- a/src/backoffice/templates/backoffice/base.html
+++ b/src/backoffice/templates/backoffice/base.html
@@ -25,7 +25,7 @@
   </head>
 
   <body>
-    <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
+    <nav class="navbar navbar-expand-lg navbar-dark bg-dark px-2">
       <a class="navbar-brand" href="{% url 'backoffice:index' %}">{{ conference.slug }} {% trans "title_suffix" %}</a>
       <button class="navbar-toggler"
               type="button"
@@ -140,7 +140,7 @@
                data-bs-toggle="dropdown"
                aria-haspopup="true"
                aria-expanded="false">{{ LANGUAGE_CODE }}</a>
-            <div class="dropdown-menu dropdown-menu-right"
+            <div class="dropdown-menu dropdown-menu-end"
                  aria-labelledby="navbarLangDropdown">
               <form method="post" action="{% url 'set_language' %}">
                 {% csrf_token %}
@@ -166,7 +166,7 @@
                  data-bs-toggle="dropdown"
                  aria-haspopup="true"
                  aria-expanded="false">{{ user.get_full_name|default:user.username }}</a>
-              <div class="dropdown-menu dropdown-menu-right"
+              <div class="dropdown-menu dropdown-menu-end"
                    aria-labelledby="navbarUserDropdown">
                 <a class="dropdown-item" href="{% url 'backoffice:profile' %}">{% trans "nav_profile" %}</a>
                 <a class="dropdown-item" href="{% url 'backoffice:password_change' %}">{% trans "nav_change_password" %}</a>
diff --git a/src/backoffice/templates/backoffice/schedule_source-detail.html b/src/backoffice/templates/backoffice/schedule_source-detail.html
index 8407cc6cd4fa8168bde1feb0f36f0d20e0e5f1d2..474b7c5d2d95350895583f87b5992ab3be16f9e3 100644
--- a/src/backoffice/templates/backoffice/schedule_source-detail.html
+++ b/src/backoffice/templates/backoffice/schedule_source-detail.html
@@ -11,7 +11,7 @@
   <div class="card mb-3">
     <div class="card-header">
       ID <code>{{ object.id }}</code>
-      <span class="float-right">
+      <span class="float-end">
         <a href="{% url 'backoffice:schedulesource-edit' pk=object.id %}"
            class="btn btn-sm btn-outline-primary text-primary">edit</a>
         <a href="{% url 'backoffice:schedulesource-remove' pk=object.id %}"
@@ -50,7 +50,7 @@
       <form action="{% url 'backoffice:schedulesource-import' pk=object.id %}"
             method="post">
         {% csrf_token %}
-        <button type="submit" class="btn btn-sm btn-primary float-right">run an import NOW</button>
+        <button type="submit" class="btn btn-sm btn-primary float-end">run an import NOW</button>
       </form>
       Imports
     </div>
diff --git a/src/backoffice/templates/backoffice/wa-map-detail.html b/src/backoffice/templates/backoffice/wa-map-detail.html
index f5da6bc2cdd3f9f20c5051dac53084a4c25fe19b..add7aac05150983fa5db5d698c6eac71899f0caa 100644
--- a/src/backoffice/templates/backoffice/wa-map-detail.html
+++ b/src/backoffice/templates/backoffice/wa-map-detail.html
@@ -216,7 +216,7 @@ $(function() {
       <div class="col col-md-12">
         <div class="card mt-3">
           <div class="card-header bg-{{ wa_linter.status }}">
-            <span class="float-right small bg-white p-1">
+            <span class="float-end small bg-white p-1">
               preview from <a href="{% url 'backoffice:assembly-room' assembly=room.assembly.id pk=room.id %}"
     title="maybe 403 for u?">assembly backoffice room page</a>
             </span>
diff --git a/src/backoffice/templates/backoffice/wa-session-detail.html b/src/backoffice/templates/backoffice/wa-session-detail.html
index 494270a9816e0a9a7bd852b1618efda4561e8cb5..707fdb23fa5afddca53677091deed55683882e75 100644
--- a/src/backoffice/templates/backoffice/wa-session-detail.html
+++ b/src/backoffice/templates/backoffice/wa-session-detail.html
@@ -9,13 +9,13 @@
             action="{% url 'backoffice:workadventure-session-delete' pk=object.id %}">
         {% csrf_token %}
         <input type="hidden" name="terminate" value="1">
-        <button class="btn btn-danger btn-sm ms-3 float-right" type="submit">terminate session</button>
+        <button class="btn btn-danger btn-sm ms-3 float-end" type="submit">terminate session</button>
       </form>
       <form method="post"
             action="{% url 'backoffice:workadventure-session-delete' pk=object.id %}">
         {% csrf_token %}
         <input type="hidden" name="terminate" value="0">
-        <button class="btn btn-outline-danger btn-sm ms-3 float-right" type="submit">delete session</button>
+        <button class="btn btn-outline-danger btn-sm ms-3 float-end" type="submit">delete session</button>
       </form>
       WorkAdventure session {{ object.id }}
     </div>
@@ -80,7 +80,7 @@
           <form method="post"
                 action="{% url 'backoffice:workadventure-session-pushdata' pk=object.id %}">
             {% csrf_token %}
-            <button class="btn btn-sm btn-primary float-right"
+            <button class="btn btn-sm btn-primary float-end"
                     type="submit"
                     title="push data to backend">push</button>
           </form>
diff --git a/src/backoffice/templates/backoffice/wa-texture-form.html b/src/backoffice/templates/backoffice/wa-texture-form.html
index d016ebb3e62c6eace2d3224aa29362265aee0910..deed0e5d373aee8e7632d9d61d521cd974767b61 100644
--- a/src/backoffice/templates/backoffice/wa-texture-form.html
+++ b/src/backoffice/templates/backoffice/wa-texture-form.html
@@ -10,7 +10,7 @@
         <form action="{% url 'backoffice:workadventure-texture-remove' pk=object.id %}"
               method="post">
           {% csrf_token %}
-          <button type="submit" class="btn btn-danger btn-sm float-right">delete</button>
+          <button type="submit" class="btn btn-danger btn-sm float-end">delete</button>
         </form>
       {% endif %}
       WorkAdventure Texture {{ object.id|default:"(NEW)" }}
diff --git a/src/backoffice/templates/backoffice/wa-texture-list.html b/src/backoffice/templates/backoffice/wa-texture-list.html
index 07aa4b349de4c11cdfd07d288843889f28c8e34a..fa59e034710fac0483e846d069ef2d91fc7fb79f 100644
--- a/src/backoffice/templates/backoffice/wa-texture-list.html
+++ b/src/backoffice/templates/backoffice/wa-texture-list.html
@@ -5,7 +5,7 @@
   <div class="card mt-3">
     <div class="card-header">
       <a href="{% url 'backoffice:workadventure-texture-add' %}"
-         class="btn btn-sm btn-secondary float-right">add</a>
+         class="btn btn-sm btn-secondary float-end">add</a>
       WorkAdventure Textures
       <span class="badge badge-primary">{{ object_list|length }}</span>
     </div>
diff --git a/src/backoffice/templates/backoffice/wiki_page_detail.html b/src/backoffice/templates/backoffice/wiki_page_detail.html
index f54315ced1a345b5ad07aeff7922cdc1d056dd08..037674a3a0154e9a977dc1acb1148e7c6e27259a 100644
--- a/src/backoffice/templates/backoffice/wiki_page_detail.html
+++ b/src/backoffice/templates/backoffice/wiki_page_detail.html
@@ -31,7 +31,7 @@
         {% endif %}
         {% bootstrap_form form %}
       </div>
-      <div class="card-footer text-right">
+      <div class="card-footer text-end">
         <button type="submit" class="btn btn-danger" form="delete_page">{% trans "StaticPage--delete-page" %}</button>
         <button type="submit" class="btn btn-primary">{% trans "assemblyedit_submitbtn" %}</button>
       </div>