diff --git a/docs/extensions/admonition.md b/docs/extensions/admonition.md
index 24d8254a9..4f79d488e 100644
--- a/docs/extensions/admonition.md
+++ b/docs/extensions/admonition.md
@@ -99,7 +99,7 @@ Styling
 There is no CSS included as part of this extension. Check out the default
 [Sphinx][sphinx] theme for inspiration.
 
-[sphinx]: https://www.sphinx-doc.org/en/stable/
+[sphinx]: https://www.sphinx-doc.org/en/master/
 
 ## Usage