diff --git a/manuels/templates/manuels/add_book.html b/manuels/templates/manuels/add_book.html
index fd271f4..e6f20e3 100644
--- a/manuels/templates/manuels/add_book.html
+++ b/manuels/templates/manuels/add_book.html
@@ -39,7 +39,7 @@
         </div>
     </div>
     <div class="form-row">
-        <div class="col-8">
+        <div class="col-12">
             <div class="form-group">
                 {% bootstrap_label content=form.isbn.label label_for=form.isbn.auto_id %}
                 <div class="input-group">