diff --git a/doc/source/index.rst b/doc/source/index.rst
index 9a727ce..c13d7b3 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -3,9 +3,9 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
-============================================
+===========================================
 Welcome to the documentation of venusclient
-============================================
+===========================================
 
 Contents: