diff --git a/docs/src/tutorial/3-advanced.md b/docs/src/tutorial/3-advanced.md
index a1aa9ade..fcce481f 100644
--- a/docs/src/tutorial/3-advanced.md
+++ b/docs/src/tutorial/3-advanced.md
@@ -337,10 +337,10 @@ a way to set any of that, we need to write our own heading show rule.
 >>>   ),
 >>>   numbering: "1",
 >>> )
-#show heading: it => block(width: 100%)[
+#show heading: it => [
   #set align(center)
   #set text(12pt, weight: "regular")
-  #smallcaps(it.body)
+  #block(smallcaps(it.body))
 ]
 
 <<< ...