diff --git a/inst/rmarkdown/templates/posterdown_pdf/resources/template.tex b/inst/rmarkdown/templates/posterdown_pdf/resources/template.tex
index a84ec75..385887a 100644
--- a/inst/rmarkdown/templates/posterdown_pdf/resources/template.tex
+++ b/inst/rmarkdown/templates/posterdown_pdf/resources/template.tex
@@ -7,7 +7,7 @@
 %% %%		Brent Thorne
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-\documentclass[article,30pt,extrafontsizes]{memoir}
+\documentclass[article,$font_size$,extrafontsizes]{memoir}
 
 %utf-8 seems to be important
 \RequirePackage[utf8]{inputenc}