diff --git a/css/report/rubric-box-for-student.less b/css/report/rubric-box-for-student.less
index b3a61f4b..c2d04fbc 100644
--- a/css/report/rubric-box-for-student.less
+++ b/css/report/rubric-box-for-student.less
@@ -1,4 +1,5 @@
 .rubric-box-for-student {
+  width: 100%;
   border-collapse: collapse;
   color: #777;