diff --git a/webpage_contents/_quarto.yml b/webpage_contents/_quarto.yml
index 2da252c57e9f17134092331459c92b345765809a..46813afd7bde8dff4403be466dd9683e9dc50484 100644
--- a/webpage_contents/_quarto.yml
+++ b/webpage_contents/_quarto.yml
@@ -8,7 +8,7 @@ book:
     sidebar: 
         logo: images/Logo_fluidDynamicsCNS.png 
     chapters:        
-      - index.md                
+      - index.qmd                
       - content_glossary.md             
       - content_metadata_tables.qmd