diff --git a/apps/school/templates/blocks/open_lesson.html b/apps/school/templates/blocks/open_lesson.html
index 0bcf435f..46999c7f 100644
--- a/apps/school/templates/blocks/open_lesson.html
+++ b/apps/school/templates/blocks/open_lesson.html
@@ -1,4 +1,4 @@
 <a
-  class="timing__btn btn"
+  class="timing__btn btn btn_light"
   href="{% url 'school:lesson-detail' live_lesson.id %}"
 >смотреть урок</a>