diff --git a/datamodels/2.x/itop-core-update/css/itop-core-update.scss b/datamodels/2.x/itop-core-update/css/itop-core-update.scss
index a7c0103572..ab1f27dba0 100644
--- a/datamodels/2.x/itop-core-update/css/itop-core-update.scss
+++ b/datamodels/2.x/itop-core-update/css/itop-core-update.scss
@@ -7,19 +7,8 @@
   font-size: 1.17rem;
 }
 
-#progress {
-  margin: 5px auto;
-  display:block;
-  width: 280px;
-  height: 20px;
-  line-height: 20px;
-  text-align: center;
-
-  .progress {
-    margin: 0;
-  }
-
-  .text {
-    margin: 0;
-  }
-}
+#progress_content {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
\ No newline at end of file
diff --git a/datamodels/2.x/itop-core-update/datamodel.itop-core-update.xml b/datamodels/2.x/itop-core-update/datamodel.itop-core-update.xml
index 33ba019e9c..7ea5e0e77c 100644
--- a/datamodels/2.x/itop-core-update/datamodel.itop-core-update.xml
+++ b/datamodels/2.x/itop-core-update/datamodel.itop-core-update.xml
@@ -8,11 +8,4 @@
       <enable_admin_only>1</enable_admin_only>
     </menu>
   </menus>
-  <branding>
-    <themes_common>
-      <stylesheets>
-        <stylesheet id="itop-core-update-style" _delta="define">itop-core-update/css/itop-core-update.scss</stylesheet>
-      </stylesheets>
-    </themes_common>
-  </branding>
 </itop_design>
diff --git a/datamodels/2.x/itop-core-update/src/Controller/UpdateController.php b/datamodels/2.x/itop-core-update/src/Controller/UpdateController.php
index 03dc2d9dff..6f6c08eb1f 100644
--- a/datamodels/2.x/itop-core-update/src/Controller/UpdateController.php
+++ b/datamodels/2.x/itop-core-update/src/Controller/UpdateController.php
@@ -159,6 +159,7 @@ class UpdateController extends Controller
 		];
 		$this->AddLinkedScript(utils::GetAbsoluteUrlAppRoot().'setup/jquery.progression.js');
 		$this->AddSaas('css/backoffice/main.scss');
+		$this->AddSaas('env-'.utils::GetCurrentEnvironment().'/itop-core-update/css/itop-core-update.scss');
 		$this->m_sOperation = 'UpdateCoreFiles';
 		$this->DisplaySetupPage($aParams);
 	}
diff --git a/datamodels/2.x/itop-core-update/templates/UpdateCoreFiles.html.twig b/datamodels/2.x/itop-core-update/templates/UpdateCoreFiles.html.twig
index fdb86400f7..70548e30a4 100644
--- a/datamodels/2.x/itop-core-update/templates/UpdateCoreFiles.html.twig
+++ b/datamodels/2.x/itop-core-update/templates/UpdateCoreFiles.html.twig
@@ -9,9 +9,7 @@
             {% UIFieldSet Standard {sLegend:'iTopUpdate:UI:Progress'|dict_s, sId:'installation_progress'} %}
                 {#  Todo 3.0 Add Progress bar UIBlock  #}
                 <div id="progress_content">
-                    <p class="center">
-                        <span id="setup_msg">{{ 'iTopUpdate:UI:SetupMessage:Ready'|dict_s }}</span>
-                    </p>
+                    <span id="setup_msg">{{ 'iTopUpdate:UI:SetupMessage:Ready'|dict_s }}</span>
                     <div id="progress">0%</div>
                 </div>
             {% EndUIFieldSet %}