diff --git a/vignettes/gDRcore.Rmd b/vignettes/gDRcore.Rmd
index 189fe280..66244be1 100644
--- a/vignettes/gDRcore.Rmd
+++ b/vignettes/gDRcore.Rmd
@@ -15,7 +15,7 @@ knitr::opts_chunk$set(
 )
 ```
 
-```{r setup}
+```{r setup, echo = FALSE}
 library(gDRimport)
 library(gDRtestData)
 library(gDRcore)