diff --git a/html-entities/eff.css b/html-entities/eff.css
index 5c8e48e..92e9121 100644
--- a/html-entities/eff.css
+++ b/html-entities/eff.css
@@ -3,7 +3,7 @@ html, textarea {
 }
 
 body {
-	max-width: 40em;
+	max-width: 100%;
 	padding: 0 1em;
 }