diff --git a/vignettes/theoretical_background.Rmd b/vignettes/theoretical_background.Rmd
index d50cc99..266eb85 100644
--- a/vignettes/theoretical_background.Rmd
+++ b/vignettes/theoretical_background.Rmd
@@ -11,7 +11,7 @@ bibliography: references.json
 link-citations: true
 vignette: >
   %\VignetteEncoding{UTF-8}
-  %\VignetteIndexEntry{Theoretical background}
+  %\VignetteIndexEntry{An overview of the theoretical background for bpmodels}
   %\VignetteEngine{knitr::rmarkdown}
 editor_options:
   chunk_output_type: console