diff --git a/packages.bib b/packages.bib
index 5dbb18b..f23e0ca 100644
--- a/packages.bib
+++ b/packages.bib
@@ -18,16 +18,16 @@ @Manual{R-bookdown
 @Manual{R-knitr,
   title = {knitr: A General-Purpose Package for Dynamic Report Generation in R},
   author = {Yihui Xie},
-  year = {2021},
-  note = {R package version 1.36.7},
+  year = {2022},
+  note = {R package version 1.39},
   url = {https://yihui.org/knitr/},
 }
 
 @Manual{R-rmarkdown,
   title = {rmarkdown: Dynamic Documents for R},
   author = {JJ Allaire and Yihui Xie and Jonathan McPherson and Javier Luraschi and Kevin Ushey and Aron Atkins and Hadley Wickham and Joe Cheng and Winston Chang and Richard Iannone},
-  year = {2021},
-  note = {R package version 2.10},
+  year = {2022},
+  note = {R package version 2.14},
   url = {https://CRAN.R-project.org/package=rmarkdown},
 }
 
diff --git a/render-r-script-demo.md b/render-r-script-demo.md
index f63c3f3..bcda95c 100644
--- a/render-r-script-demo.md
+++ b/render-r-script-demo.md
@@ -1,7 +1,7 @@
 R scripts can be rendered!
 ================
 jenny
-2021-10-25
+2022-06-23
 
 Here’s some prose in a very special comment. Let’s summarize the
 built-in dataset `VADeaths`.