diff --git a/index.html b/index.html
index d33bf23..cfc420c 100644
--- a/index.html
+++ b/index.html
@@ -8,7 +8,10 @@
       * {box-sizing: border-box;}
       body {font-family: Verdana, sans-serif;}
       .mySlides {display: none;}
-      img {vertical-align: middle;}
+      img {
+        max-width: 100%;
+        vertical-align: middle;
+      }
 
       /* Slideshow container */
       .slideshow-container {