diff --git a/src/templates/menu.html b/src/templates/menu.html
index f279101..7544d27 100644
--- a/src/templates/menu.html
+++ b/src/templates/menu.html
@@ -61,7 +61,7 @@
 
             /* Fade icons slightly */
             img.question-icon:not(.toggle) {
-                opacity: 75%;
+                opacity: 0.75;
             }
 
             /* Override excessive question width on focus */