diff --git a/introToR/inst/extdata/presRaw/introToR_Session1.Rmd b/introToR/inst/extdata/presRaw/introToR_Session1.Rmd
index 70b0f49..ef6e061 100644
--- a/introToR/inst/extdata/presRaw/introToR_Session1.Rmd
+++ b/introToR/inst/extdata/presRaw/introToR_Session1.Rmd
@@ -3,7 +3,7 @@ title: "Introduction to R, Session 1 <html><div style='float:left'></div><hr col
 author: "Rockefeller University, Bioinformatics Resource Centre"
 date: "http://rockefelleruniversity.github.io/Intro_To_R_1Day/"
 output: 
-    ioslides_presentation:
+  ioslides_presentation:
     css: ["default", "metropolisCustom.css", "metropolis-fontsCustom.css"]
     lib_dir: libs
     nature:
