diff --git a/css/tufte.scss b/css/tufte.scss
index b06fd9c..a91248e 100755
--- a/css/tufte.scss
+++ b/css/tufte.scss
@@ -25,6 +25,11 @@ nav_exclude: true
 
 */
 
+img[src$="centerme"] {
+  display:block;
+  margin: 0 auto;
+}
+
 // global resets
 *, *:before, *:after {
     margin: 0;