diff --git a/css/reveal.css b/css/reveal.css
index c865325a..d7442d65 100644
--- a/css/reveal.css
+++ b/css/reveal.css
@@ -17,6 +17,7 @@ html {
 
 body {
   height: 100%;
+  overflow: hidden;
   position: relative;
   line-height: 1;
   margin: 0;
diff --git a/css/reveal.scss b/css/reveal.scss
index e7d29816..c93276f4 100644
--- a/css/reveal.scss
+++ b/css/reveal.scss
@@ -21,6 +21,7 @@ html {
 
 body {
 	height: 100%;
+	overflow: hidden;
 	position: relative;
 	line-height: 1;
 	margin: 0;