diff --git a/relational-data.Rmd b/relational-data.Rmd
index db70bab..3ad62fb 100644
--- a/relational-data.Rmd
+++ b/relational-data.Rmd
@@ -29,7 +29,7 @@ library(nycflights13)
 
 ## nycflights13 {#nycflights13-relational}
 
-We will use the nycflights13 package to learn about relational data. nycflights13 contains four tibbles that are related to the `flights` table that you used in [data transformation]:
+We will use the nycflights13 package to learn about relational data. nycflights13 contains five tibbles : `airlines`, `airports`, `weather` and `planes` which are all related to the `flights` table that you used in [data transformation]:
 
 *   `airlines` lets you look up the full carrier name from its abbreviated
     code: