diff --git a/lti_consumer/static/sass/student.scss b/lti_consumer/static/sass/student.scss
index 7b7fd91e..31f590df 100644
--- a/lti_consumer/static/sass/student.scss
+++ b/lti_consumer/static/sass/student.scss
@@ -114,7 +114,7 @@
             z-index: 11000;
             box-sizing: border-box;
             margin-left: 0;
-            height: auto;
+            height: 100%;
             padding: 8px;
             border-radius: 3px;
             box-shadow: 0 0 5px 0 rgba(0, 0, 0, 0.4);