diff --git a/renderer.php b/renderer.php
index b3d0163..0c69ff1 100644
--- a/renderer.php
+++ b/renderer.php
@@ -1778,7 +1778,8 @@ class mod_attendance_renderer extends plugin_renderer_base {
                 'name'      => $name,
                 'size'      => $size,
                 'maxlength' => $maxlength,
-                'value'     => $value);
+                'value'     => $value,
+                'class' => 'form-control');
         return html_writer::empty_tag('input', $attributes);
     }
 
diff --git a/styles.css b/styles.css
index d0c5713..4ba7c2f 100644
--- a/styles.css
+++ b/styles.css
@@ -196,4 +196,9 @@
 
 #page-mod-attendance-view .averageattendance {
     font-weight: bold;
+}
+
+#page-mod-attendance-preferences .form-control {
+    width: inherit;
+    display: inherit;
 }
\ No newline at end of file