diff --git a/IPython/nbconvert/templates/slides_reveal.tpl b/IPython/nbconvert/templates/slides_reveal.tpl
index 33ad754..e505605 100644
--- a/IPython/nbconvert/templates/slides_reveal.tpl
+++ b/IPython/nbconvert/templates/slides_reveal.tpl
@@ -45,7 +45,7 @@ html {
   overflow-y: auto;
 }
 .reveal {
-  font-size: 20px;
+  font-size: 160%;
 }
 .reveal pre {
   width: inherit;