diff --git a/vignettes/citfuns.Rmd b/vignettes/citfuns.Rmd
index ad21954..205e189 100644
--- a/vignettes/citfuns.Rmd
+++ b/vignettes/citfuns.Rmd
@@ -134,3 +134,4 @@ Finally, you can show only the upper part or the lower part of the specular matr
 
 ```{r, fig.width=5, fig.height=4}
 ggcorrplot(df, var = "Cyt", value = "Value", color = "black", tri="lower")
+```