diff --git a/css/reveal.css b/css/reveal.css
index b3bc948..8671760 100644
--- a/css/reveal.css
+++ b/css/reveal.css
@@ -345,7 +345,7 @@ section.left .gist .gist-data {
 /* Single image on slide at full size */
 section > p > img {
   width: auto;
-  height: auto;
+  height: 70%;
   max-height: 100%;
   max-width: 100%;
 }