diff --git a/intro.Rmd b/intro.Rmd
index fba85c3..7df1ff1 100644
--- a/intro.Rmd
+++ b/intro.Rmd
@@ -129,8 +129,8 @@ You'll also need to install some R packages. An R _package_ is a collection of f
 ```{r}
 pkgs <- c(
   "broom", "dplyr", "ggplot2", "jpeg", "jsonlite", 
-  "knitr", "microbenchmark", "png", "pryr", "purrr", "readr", "stringr", 
-  "tidyr"
+  "knitr", "Lahman", "microbenchmark", "png", "pryr", "purrr", 
+  "rcorpora", "readr", "stringr", "tibble", "tidyr"
 )
 install.packages(pkgs)
 ```