diff --git a/guide/src/format/markdown.md b/guide/src/format/markdown.md
index f63e0888..7c9b22bb 100644
--- a/guide/src/format/markdown.md
+++ b/guide/src/format/markdown.md
@@ -232,4 +232,4 @@ Example:
 
 This makes the level 1 heading with the content `Example heading`, ID `first`, and classes `class1` and `class2`. Note that the attributes should be space-separated.
 
-More information can be found in the [heading attrs spec page](https://github.com/raphlinus/pulldown-cmark/blob/master/specs/heading_attrs.txt).
+More information can be found in the [heading attrs spec page](https://github.com/raphlinus/pulldown-cmark/blob/master/pulldown-cmark/specs/heading_attrs.txt).