diff --git a/refunding/templates/refunding/refund_payment_detail.html b/refunding/templates/refunding/refund_payment_detail.html
index f577b94..f6aa76d 100644
--- a/refunding/templates/refunding/refund_payment_detail.html
+++ b/refunding/templates/refunding/refund_payment_detail.html
@@ -35,6 +35,6 @@
         {% csrf_token %}
         {{ form.media }}
         {{ form|crispy }}
-        <input class="btn btn-primary" type="submit" value="Enregistrer"/>
+        <input class="btn btn-primary col-xs-12 col-sm-4 col-sm-offset-4" type="submit" value="Enregistrer"/>
     </form>
 {% endblock %}