diff --git a/app/templates/service/activate.html b/app/templates/service/activate.html
index 375c34c..a9bb801 100644
--- a/app/templates/service/activate.html
+++ b/app/templates/service/activate.html
@@ -24,7 +24,7 @@ Activate service | {{ config['PUBLIC_CONFIG'].site.title }}
                         <input class="form-control" id="license" name="license"
                                placeholder="{% trans %}Activate service.{% endtrans %}" required type="text" value="">
                     </div>
-                    {{ form_field(form.submit, class="btn") }}
+                    {{ form_field(form.submit, class="btn btn-success") }}
                 </form>
             </div>
             <div class="row">
@@ -39,4 +39,4 @@ Activate service | {{ config['PUBLIC_CONFIG'].site.title }}
 
 {% block scripts %}
 {{ super() }}
-{%- endblock %}
\ No newline at end of file
+{%- endblock %}