diff --git a/frontend/stylesheets/pages/_evals.scss b/frontend/stylesheets/pages/_evals.scss
index b134244c..7488542e 100644
--- a/frontend/stylesheets/pages/_evals.scss
+++ b/frontend/stylesheets/pages/_evals.scss
@@ -61,8 +61,19 @@
     border: 0;
     background: transparent;
     width: 100%;
-    height: 0;
     text-align: center;
+    display: block;
+  }
+  
+  &[aria-expanded="true"] {
+    span.glyphicon {
+      transform: rotate(180deg);
+    }
+  }
+  
+  span.glyphicon {
+    transition: transform ease-in-out 0.2s;
+    transform: rotate(0deg);
   }
 }