diff --git a/css/reveal.css b/css/reveal.css
index 841455c4..8bbe38c5 100644
--- a/css/reveal.css
+++ b/css/reveal.css
@@ -71,8 +71,8 @@ body {
             transform: none; }
 
 .reveal .slides section .fragment.roll-in {
-  -webkit-transform: rotateX(90deg);
-          transform: rotateX(90deg); }
+  -webkit-transform: rotateX(60deg);
+          transform: rotateX(60deg); }
   .reveal .slides section .fragment.roll-in.visible {
     -webkit-transform: none;
         -ms-transform: none;
diff --git a/css/reveal.scss b/css/reveal.scss
index 7f9c993f..dd7cc75e 100644
--- a/css/reveal.scss
+++ b/css/reveal.scss
@@ -100,7 +100,7 @@ body {
 }
 
 .reveal .slides section .fragment.roll-in {
-	transform: rotateX( 90deg );
+	transform: rotateX( 60deg );
 
 	&.visible {
 		transform: none;