diff --git a/for-scripters/R/notebooks/_site.yml b/for-scripters/R/notebooks/_site.yml
index 58eebd3..cc0a037 100644
--- a/for-scripters/R/notebooks/_site.yml
+++ b/for-scripters/R/notebooks/_site.yml
@@ -41,9 +41,9 @@ navbar:
     - text: "WikiPathways and RCy3"
       href: rWikiPathways-and-RCy3.nb.html
     - text: "WikiPathways Data Visualization Basic"
-      href: wikipathways-data-visualiztion-basic.nb.html
+      href: Wikipathways-data-visualiztion-basic.nb.html
     - text: "WikiPathways Data Visualization Advanced"
-      href: wikipathways-data-visualiztion-advanced.nb.html
+      href: Wikipathways-data-visualiztion-advanced.nb.html
     - text: "Phylogenetic trees"
       href: Phylogenetic-trees.nb.html
     - text: "Jupyter Bridge and RCy3"
@@ -93,5 +93,3 @@ output:
     toc: yes
     toc_depth: 3
     toc_float: yes
-   
-