diff --git a/application/views/layouts/backend/backend_footer.php b/application/views/layouts/backend/backend_footer.php
index 0fb1c564..229d7126 100644
--- a/application/views/layouts/backend/backend_footer.php
+++ b/application/views/layouts/backend/backend_footer.php
@@ -32,7 +32,7 @@
 
         |
 
-        <span id="select-language" class="badge badge-secondary">
+        <span id="select-language" class="badge bg-secondary">
             <i class="fas fa-language mr-2"></i>
         	<?= ucfirst(config('language')) ?>
         </span>
diff --git a/application/views/layouts/booking/booking_footer.php b/application/views/layouts/booking/booking_footer.php
index cecdca4c..774afa10 100644
--- a/application/views/layouts/booking/booking_footer.php
+++ b/application/views/layouts/booking/booking_footer.php
@@ -7,12 +7,12 @@
         </span>
 
         <span class="footer-options">
-            <span id="select-language" class="badge badge-secondary">
+            <span id="select-language" class="badge bg-secondary">
                 <i class="fas fa-language mr-2"></i>
                 <?= ucfirst(config('language')) ?>
             </span>
     
-            <a class="backend-link badge badge-primary" href="<?= site_url('backend'); ?>">
+            <a class="backend-link badge bg-primary" href="<?= site_url('backend'); ?>">
                 <i class="fas fa-sign-in-alt mr-2"></i>
                 <?= session('user_id') ? lang('backend_section') : lang('login') ?>
             </a>
diff --git a/application/views/pages/account/account_login_page.php b/application/views/pages/account/account_login_page.php
index 8871e48e..543b360d 100644
--- a/application/views/pages/account/account_login_page.php
+++ b/application/views/pages/account/account_login_page.php
@@ -41,7 +41,7 @@
         <?= lang('forgot_your_password') ?>
     </a>
     |
-    <span id="select-language" class="badge badge-success">
+    <span id="select-language" class="badge bg-success">
         <?= ucfirst(config('language')) ?>
     </span>
 
diff --git a/application/views/pages/instance/instance_installation_page.php b/application/views/pages/instance/instance_installation_page.php
index 7fee2f6e..36b49982 100755
--- a/application/views/pages/instance/instance_installation_page.php
+++ b/application/views/pages/instance/instance_installation_page.php
@@ -115,7 +115,7 @@
 
     <p>
     <h3>License</h3>
-    Easy!Appointments is licensed under the <span class="badge badge-default">GPL-3.0 license</span>.
+    Easy!Appointments is licensed under the <span class="badge bg-secondary">GPL-3.0 license</span>.
     By using the code of Easy!Appointments in any way <br> you agree with the terms described in the
     following url:
     <a href="https://www.gnu.org/licenses/gpl-3.0.en.html">https://www.gnu.org/licenses/gpl-3.0.en.html</a>