diff --git a/setup.md b/setup.md
index 5a0161d42da5d41be92aeb2f5359ffb4897e4c6f..17e264b826caf0186dba09ed898fdcdb115a6342 100644
--- a/setup.md
+++ b/setup.md
@@ -184,7 +184,7 @@ you must install the software described below.
 
     ```
     > install.packages('knitr', dependencies = TRUE)
-    > install.packages('stringer', dependencies = TRUE)
+    > install.packages('stringr', dependencies = TRUE)
     > install.packages('checkpoint', dependencies = TRUE)
     ```