diff --git a/style/shiny/single.css b/style/shiny/single.css
index c218cbb..1922c2a 100644
--- a/style/shiny/single.css
+++ b/style/shiny/single.css
@@ -147,7 +147,7 @@
   /* maybe one day... */
   /* shape-outside: attr(src url); */
   shape-margin: 1em;
-  filter: drop-shadow(5px 5px 8px #0008);
+  filter: drop-shadow(5px 5px 8px #0006);
 }
 
 #info h2, #info ul, #info ol, #info p, #info dl, #info details {