diff --git a/index.html b/index.html
index b58941cd..962dd34a 100644
--- a/index.html
+++ b/index.html
@@ -198,9 +198,9 @@
       img.example_image {
         margin: 0px auto;
       }
-    @media only screen and (-webkit-min-device-pixel-ratio: 1.5),
-          only screen and (-o-min-device-pixel-ratio: 3/2),
-          only screen and (min-device-pixel-ratio: 1.5) {
+    @media only screen and (-webkit-min-device-pixel-ratio: 1.5) and (max-width: 640px),
+          only screen and (-o-min-device-pixel-ratio: 3/2) and (max-width: 640px),
+          only screen and (min-device-pixel-ratio: 1.5) and (max-width: 640px) {
       img {
         max-width: 290px;
       }