diff --git a/mkdocs.yml b/mkdocs.yml
index 8f9ee04b80c61c8382bbf63b11c7df15283204c0..a6dbf38726f79655768d1f55861e517d46d6e89a 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -203,4 +203,4 @@ markdown_extensions:
   - codehilite(css_class=code)
   - admonition
   - toc:
-      permalink: ''
+      permalink: '#'