diff --git a/docs/04_lesson.html b/docs/04_lesson.html
index a196e9f..66dd3e4 100644
--- a/docs/04_lesson.html
+++ b/docs/04_lesson.html
@@ -283,7 +283,7 @@ <h2 data-number="4.2" class="anchored" data-anchor-id="motivation"><span class="
 <h2 data-number="4.3" class="anchored" data-anchor-id="packages"><span class="header-section-number">4.3</span> Packages</h2>
 <p>We’ll be using three packages from the <code>tidyverse</code> for data import and export. These three should cover just about all of your use cases at Urban.</p>
 <ul>
-<li><code>readr</code> - for plain text files</li>
+<li><code>readr</code> - for plain text files (<code>.csv</code>, <code>.tsv</code>)</li>
 <li><code>readxl</code> - for Excel files (<code>.xlsx</code>, <code>.xls</code>)</li>
 <li><code>haven</code> - for SAS (<code>.sas7bdat</code> + <code>.sas7bcat</code> files), SPSS (<code>.sav</code> files), and Stata (<code>.dta</code> files up to Stata version 17) formats</li>
 </ul>
diff --git a/docs/search.json b/docs/search.json
index 78d5479..17a12ed 100644
--- a/docs/search.json
+++ b/docs/search.json
@@ -270,7 +270,7 @@
     "href": "04_lesson.html#packages",
     "title": "4  Data Import",
     "section": "4.3 Packages",
-    "text": "4.3 Packages\nWe’ll be using three packages from the tidyverse for data import and export. These three should cover just about all of your use cases at Urban.\n\nreadr - for plain text files\nreadxl - for Excel files (.xlsx, .xls)\nhaven - for SAS (.sas7bdat + .sas7bcat files), SPSS (.sav files), and Stata (.dta files up to Stata version 17) formats\n\nOne note - while all three packages are installed with the tidyverse, only readr is loaded when you run library(tidyverse) in your R session. The other packages must be loaded separately."
+    "text": "4.3 Packages\nWe’ll be using three packages from the tidyverse for data import and export. These three should cover just about all of your use cases at Urban.\n\nreadr - for plain text files (.csv, .tsv)\nreadxl - for Excel files (.xlsx, .xls)\nhaven - for SAS (.sas7bdat + .sas7bcat files), SPSS (.sav files), and Stata (.dta files up to Stata version 17) formats\n\nOne note - while all three packages are installed with the tidyverse, only readr is loaded when you run library(tidyverse) in your R session. The other packages must be loaded separately."
   },
   {
     "objectID": "04_lesson.html#primary-functions",
diff --git a/intro_series_book/04_lesson.qmd b/intro_series_book/04_lesson.qmd
index 12f310f..bac006f 100644
--- a/intro_series_book/04_lesson.qmd
+++ b/intro_series_book/04_lesson.qmd
@@ -62,7 +62,7 @@ library(arrow)
 
 We'll be using three packages from the `tidyverse` for data import and export. These three should cover just about all of your use cases at Urban.
 
--   `readr` - for plain text files
+-   `readr` - for plain text files (`.csv`, `.tsv`)
 -   `readxl` - for Excel files (`.xlsx`, `.xls`)
 -   `haven` - for SAS (`.sas7bdat` + `.sas7bcat` files), SPSS (`.sav` files), and Stata (`.dta` files up to Stata version 17) formats