diff --git a/app/assets/stylesheets/theater.css b/app/assets/stylesheets/theater.css
index 42b8024..230a204 100644
--- a/app/assets/stylesheets/theater.css
+++ b/app/assets/stylesheets/theater.css
@@ -53,7 +53,7 @@ body {
   width: 50px;
   height: 20px;
   text-align: center;
-  font-size: 0.625px;
+  font-size: 0.625rem;
 }
 
 .spinner > div {