diff --git a/docs/index.rst b/docs/index.rst
index 33441a3..d1962eb 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -51,7 +51,7 @@ Document Structure
    :caption: ADVANCED TOPICS:
 
    Anchor Learnware <advanced/anchor.rst>
-   Specification Evolvement <advanced/evolve.rst>
+   Evolvable Specification <advanced/evolve.rst>
 
 .. toctree::
    :maxdepth: 3